I'm out of ideas on the alignment of the addresses on your PDF.
The PDF invoice cannot user the address_template view file.
So you need to change it in the same file plugins/hikashop/attachinvoice/attachinvoice/invoice.php
It's that block of code:
<?php
if(!empty($order->$oneAddress->address_company)) echo $order->$oneAddress->address_company.'<br/>';
echo $order->$oneAddress->address_title.' '.$order->$oneAddress->address_firstname.' '.$order->$oneAddress->address_lastname.'<br/>';
echo $order->$oneAddress->address_street.'<br/>';
echo $order->$oneAddress->address_post_code.' '.$order->$oneAddress->address_city.' '.$order->$oneAddress->address_state.'<br/>';
echo $order->$oneAddress->address_country.'<br/>';
if(!empty($order->$oneAddress->address_telephone)) echo JText::sprintf('TELEPHONE_IN_ADDRESS',$order->$oneAddress->address_telephone).'<br/>';
if(!empty($order->$oneAddress->address_vat)) echo JText::_('VAT_NUMBER').' : '.$order->$oneAddress->address_vat.'<br/>';
?>