Wrong variant added to cart

<?php
/**
 * @package	HikaShop for Joomla!
 * @version	2.6.2
 * @author	hikashop.com
 * @copyright	(C) 2010-2016 HIKARI SOFTWARE. All rights reserved.
 * @license	GNU/GPLv3 http://www.gnu.org/licenses/gpl-3.0.html
 */
defined('_JEXEC') or die('Restricted access');
?><?php

hikashop_loadJslib('jquery');
$js = '';
$params = null;
$this->params->set('vote_type','product');
if(isset($this->element->main)){
	$product_id = $this->element->main->product_id;
}else{
	$product_id = $this->element->product_id;
}
$this->params->set('vote_ref_id',$product_id);
$this->params->set('productlayout','show_tabular');
$layout_vote_mini = hikashop_getLayout('vote', 'mini', $this->params, $js);
$layout_vote_listing = hikashop_getLayout('vote', 'listing', $this->params, $js);
$layout_vote_form = hikashop_getLayout('vote', 'form', $this->params, $js);
$config =& hikashop_config();
$status_vote = $config->get('enable_status_vote');
$hide_specs = 1;
if($this->element->product_manufacturer_id != 0 || $this->element->product_weight != 0 || $this->element->product_width != 0 || $this->element->product_height != 0 || $this->element->product_length != 0 || @$this->element->main->product_weight != 0 || @$this->element->main->product_width != 0 || @$this->element->main->product_height != 0 || @$this->element->main->product_length != 0)
	$hide_specs = 0;
foreach ($this->fields as $fieldName => $oneExtraField) {
	$value = '';
	if(empty($this->element->$fieldName) && !empty($this->element->main->$fieldName))$this->element->$fieldName = $this->element->main->$fieldName;
	if(isset($this->element->$fieldName))
		$value = trim($this->element->$fieldName);
	if(!empty($value)){
		$hide_specs = 0;
		break;
	}
}

?>
<div itemprop="Product" itemscope itemtype="http://schema.org/Product">
	<div id="hikashop_product_top_part" class="hikashop_product_top_part">
	<?php if(!empty($this->element->extraData->topBegin)) { echo implode("\r\n",$this->element->extraData->topBegin); } ?>
		<h1>
			<span id="hikashop_product_name_main" class="hikashop_product_name_main" itemprop="name">
				<?php
				if (hikashop_getCID('product_id')!=$this->element->product_id && isset ($this->element->main->product_name))
					echo $this->element->main->product_name;
				else
					echo $this->element->product_name;
				?>
			</span>
			<?php if ($this->config->get('show_code')) { ?>
			<span id="hikashop_product_code_main" class="hikashop_product_code_main" itemprop="model">
				<span id="hikashop_product_code_main" class="hikashop_product_code_main">
					<?php
					echo $this->element->product_code;
					?>
				</span>
			</span>
			<?php } ?>
		</h1>
	<?php if(!empty($this->element->extraData->topEnd)) { echo implode("\r\n",$this->element->extraData->topEnd); } ?>
		<?php
		$this->setLayout('show_block_social');
		echo $this->loadTemplate();
			?>
	</div>
</div>
<?php if(HIKASHOP_RESPONSIVE){ ?>
	<div class="<?php echo HK_GRID_ROW; ?>">
<?php } ?>
<div id="hikashop_product_left_part" class="hikashop_product_left_part <?php echo HK_GRID_COL_6; ?>">
	<?php
	if(!empty($this->element->extraData->leftBegin)) { echo implode("\r\n",$this->element->extraData->leftBegin); }

	$this->row = & $this->element;
	$this->setLayout('show_block_img');
	echo $this->loadTemplate();
	$imgMicroData = $this->loadTemplate();
	?>
	<div id="hikashop_product_description_main_mini" class="hikashop_product_description_main_mini">
		<?php
		if(!empty($this->element->product_description)){
			$resume = substr(strip_tags(preg_replace('#<hr *id="system-readmore" */>.*#is','',$this->element->product_description)),0,300);
			if (!empty($this->element->product_description) && strlen($this->element->product_description)>300)
				$resume .= " ...<a href='#hikashop_show_tabular_description'>".JText::_('READ_MORE')."</a>";
			echo JHTML::_('content.prepare',$resume);
		}
		?>
	</div>
	<?php if(!empty($this->element->extraData->leftEnd)) { echo implode("\r\n",$this->element->extraData->leftEnd); } ?>
</div>
<div id="hikashop_product_right_part" class="hikashop_product_right_part <?php echo HK_GRID_COL_6; ?>">
	<?php
	if(!empty($this->element->extraData->rightBegin))
		echo implode("\r\n",$this->element->extraData->rightBegin);
	?>
	<div itemprop="offers" itemscope itemtype="http://schema.org/Offer">
		<span id="hikashop_product_price_main" class="hikashop_product_price_main">
			<?php
			if ($this->params->get('show_price')) {
				$this->row = & $this->element;
				$this->setLayout('listing_price');
				echo $this->loadTemplate();

				$CurrId = $this->element->prices[0]->price_currency_id;
				$null = null;
				$currency = $this->currencyHelper->getCurrencies($CurrId, $null);
				$CurrCode = $currency[$CurrId]->currency_code;

			?>
				<span style="display: none;" itemprop="priceCurrency"><?php echo $CurrCode; ?></span>
			<?php
			}
			?>
		</span><br />
	</div>
	<div id="hikashop_product_vote_mini" class="hikashop_product_vote_mini">
		<?php
		if($this->params->get('show_vote_product') == '-1'){
			$this->params->set('show_vote_product',$config->get('show_vote_product'));
		}
		if($this->params->get('show_vote_product')){
			echo $layout_vote_mini;
		}
		?>
	</div>
	<?php
	if($this->params->get('characteristic_display')!='list'){
		$this->setLayout('show_block_characteristic');
		echo $this->loadTemplate();
		?>
		<br />
		<?php
	}
	$form = ',0';
	if (!$this->config->get('ajax_add_to_cart', 1)) {
		$form = ',\'hikashop_product_form\'';
	}
	if (hikashop_level(1) && !empty ($this->element->options)) {
	?>
		<div id="hikashop_product_options" class="hikashop_product_options">
			<?php
			$this->setLayout('option');
			echo $this->loadTemplate();
			?>
		</div>
		<br />
		<?php
		$form = ',\'hikashop_product_form\'';
		if ($this->config->get('redirect_url_after_add_cart', 'stay_if_cart') == 'ask_user') {
		?>
			<input type="hidden" name="popup" value="1"/>
		<?php
		}
	}
	if (!$this->params->get('catalogue') && ($this->config->get('display_add_to_cart_for_free_products') ||  ($this->config->get('display_add_to_wishlist_for_free_products', 1) && hikashop_level(1) && $this->params->get('add_to_wishlist') && $config->get('enable_wishlist', 1)) || !empty ($this->element->prices))) {
		if (!empty ($this->itemFields)) {
			$form = ',\'hikashop_product_form\'';
			if ($this->config->get('redirect_url_after_add_cart', 'stay_if_cart') == 'ask_user') {
			?>
				<input type="hidden" name="popup" value="1"/>
			<?php
			}
			$this->setLayout('show_block_custom_item');
			echo $this->loadTemplate();
		}
	}
	$this->formName = $form;
	if($this->params->get('show_price')){ ?>
		<span id="hikashop_product_price_with_options_main" class="hikashop_product_price_with_options_main"></span>
	<?php } ?>
	<?php $contact = $this->config->get('product_contact',0); ?>
	<div id="hikashop_product_contact_main" class="hikashop_product_contact_main">
		<?php
		if (hikashop_level(1) && ($contact == 2 || ($contact == 1 && !empty ($this->element->product_contact)))) {
			$empty = '';
			$params = new HikaParameter($empty);
			global $Itemid;
			$url_itemid='';
			if(!empty($Itemid)){
				$url_itemid='&Itemid='.$Itemid;
			}
			echo $this->cart->displayButton(JText :: _('CONTACT_US_FOR_INFO'), 'contact_us', $params, hikashop_completeLink('product&task=contact&cid=' . $this->element->product_id.$url_itemid), 'window.location=\'' . hikashop_completeLink('product&task=contact&cid=' . $this->element->product_id.$url_itemid) . '\';return false;');
		}
		?>
	</div>
	<?php
	if(!empty($this->element->extraData->rightMiddle))
		echo implode("\r\n",$this->element->extraData->rightMiddle);
	?>
	<span id="hikashop_product_id_main" class="hikashop_product_id_main">
		<input type="hidden" name="product_id" value="<?php echo $this->element->product_id; ?>" />
	</span>
	<br />
<?php if(empty ($this->element->characteristics) || $this->params->get('characteristic_display')!='list'){ ?>
		<div id="hikashop_product_quantity_main" class="hikashop_product_quantity_main"><?php
			$this->row = & $this->element;
			$this->ajax = 'if(hikashopCheckChangeForm(\'item\',\'hikashop_product_form\')){ return hikashopModifyQuantity(\'' . $this->row->product_id . '\',field,1' . $form . ',\'cart\'); } else { return false; }';
			$this->setLayout('quantity');
			echo $this->loadTemplate();
		?></div>
<?php
	}
	$this->setLayout('show_block_product_files');
	echo $this->loadTemplate();

	if(HIKASHOP_J30) {
		$this->setLayout('show_block_tags');
		echo $this->loadTemplate();
	}

	if(!empty($this->element->extraData->rightEnd))
		echo implode("\r\n",$this->element->extraData->rightEnd);
?>
  <!-- custom code start here -->
<div class="hikashop_tabs_content_main_desc" id="hikashop_show_tabular_main_description">
			<div id="hikashop_product_description_main" class="hikashop_product_description_main">
				<?php
				echo JHTML::_('content.prepare',preg_replace('#<hr *id="system-readmore" */>#i','',$this->element->product_description));
				?>
			</div>
			<span id="hikashop_product_url_main" class="hikashop_product_url_main">
				<?php
				if (!empty ($this->element->product_url)) {
					echo JText :: sprintf('MANUFACTURER_URL', '<a href="' . $this->element->product_url . '" target="_blank">' . $this->element->product_url . '</a>');
				}
				?>
			</span>
		</div>


<!-- custom code end here -->

</div>
<?php if(HIKASHOP_RESPONSIVE){ ?>
	</div>
<?php } ?>
	<input type="hidden" name="cart_type" id="type" value="cart"/>
	<input type="hidden" name="add" value="1"/>
	<input type="hidden" name="ctrl" value="product"/>
	<input type="hidden" name="task" value="updatecart"/>
	<input type="hidden" name="return_url" value="<?php echo urlencode(base64_encode(urldecode($this->redirect_url)));?>"/>
</form>
<div id="hikashop_product_bottom_part" class="hikashop_product_bottom_part show_tabular">
	<div id="hikashop_tabs_div">
		<ul class="hikashop_tabs_ul">
			<!--<li id="hikashop_show_tabular_description_li" class="hikashop_tabs_li ui-corner-top"><?php echo JText::_('PRODUCT_DESCRIPTION');?></li>
			<?php if($hide_specs == 0){ ?>
			<li id="hikashop_show_tabular_specification_li" class="hikashop_tabs_li ui-corner-top"><?php echo JText::_('SPECIFICATIONS');?></li>-->
			<?php }
			if($status_vote == "comment" || $status_vote == "two" || $status_vote == "both" ){
			?>
			<li id="hikashop_show_tabular_comment_li" class="hikashop_tabs_li ui-corner-top"><?php echo JText::_('PRODUCT_COMMENT');?></li>
			<li id="hikashop_show_tabular_new_comment_li" class="hikashop_tabs_li ui-corner-top"><?php echo JText::_('PRODUCT_NEW_COMMENT');?></li>
			<?php } ?>
		</ul>
		<?php
		if(!empty($this->element->extraData->bottomBegin))
			echo implode("\r\n",$this->element->extraData->bottomBegin);
		?>
		<div class="hikashop_tabs_content" id="hikashop_show_tabular_description">
			<div itemprop="thing" itemscope itemtype="https://schema.org/Thing">
				<!--<div id="hikashop_product_description_main" class="hikashop_product_description_main" itemprop="description">
					<?php
					echo JHTML::_('content.prepare',preg_replace('#<hr *id="system-readmore" */>#i','',$this->element->product_description));
					?>
				</div>-->
					<!-- Add image for Micro Data here -->
				<span style="display: none;"><?php echo $imgMicroData; ?></span>
			</div>
			<span id="hikashop_product_url_main" class="hikashop_product_url_main">
				<?php
				if (!empty ($this->element->product_url)) {
					echo JText :: sprintf('MANUFACTURER_URL', '<a href="' . $this->element->product_url . '" target="_blank">' . $this->element->product_url . '</a>');
				}
				?>
			</span>
		</div>
		<?php if($hide_specs == 0){ ?>
		<div class="hikashop_tabs_content" id="hikashop_show_tabular_specification">
		<?php
			$this->setLayout('show_block_dimensions');
			echo $this->loadTemplate();
			if(!empty($this->fields)){
				$this->setLayout('show_block_custom_main');
				echo $this->loadTemplate();
			}
		?>
		</div>
		<?php }
if($status_vote == "comment" || $status_vote == "two" || $status_vote == "both" ){ ?>
		<form action="<?php echo hikashop_currentURL() ?>" method="post" name="adminForm_hikashop_comment_form" id="hikashop_comment_form">
			<?php
			if(!empty($this->element->extraData->bottomMiddle))
				echo implode("\r\n",$this->element->extraData->bottomMiddle);
			?>
			<div class="hikashop_tabs_content" id="hikashop_show_tabular_comment">
				<div id="hikashop_vote_listing" data-votetype="product" class="hikashop_product_vote_listing">
					<?php
						echo $layout_vote_listing;
					?>
				</div>
			</div>
			<div class="hikashop_tabs_content" id="hikashop_show_tabular_new_comment">
				<div id="hikashop_vote_form" data-votetype="product" class="hikashop_product_vote_form">
					<?php
						echo $layout_vote_form;
					?>
				</div>
			</div>
		</form>
<?php } ?>
<input type="hidden" name="selected_tab" id="selected_tab" value="hikashop_show_tabular_comment"/>
		<?php
		if(!empty($this->element->extraData->bottomEnd))
			echo implode("\r\n",$this->element->extraData->bottomEnd);
		?>
	</div>
</div>
<script type="text/javascript">
	if(typeof(hkjQuery) == "undefined") window.hkjQuery = window.jQuery;
	window.hikashop.ready( function(){
		var selectedTab = hkjQuery( "#selected_tab" ).val();
		hkjQuery("#hikashop_tabs_div").children("div").css("display","none");
		hkjQuery("#"+selectedTab+"_li").addClass("hikashop_tabs_li_selected");
		hkjQuery("#"+selectedTab).css("display","inherit");
		hkjQuery("#hikashop_tabs_div .hikashop_tabs_ul li").click(function(){
			var currentLi = hkjQuery(this).attr("id");
			var currentDiv = currentLi.replace("_li","");
			hkjQuery("#hikashop_tabs_div").children("div").css("display","none");
			hkjQuery("#hikashop_tabs_div").children("form").children("div").css("display","none");
			hkjQuery("#"+currentDiv).css("display","inherit");
			hkjQuery(".hikashop_tabs_li_selected" ).removeClass("hikashop_tabs_li_selected");
			hkjQuery("#"+currentLi).addClass("hikashop_tabs_li_selected");
		});
	});
</script>