Indeed this is a strange behavior.
We'll try to look at it but if you want to solve the problem quickly you can edit the payment plugin in plugins/hikashoppayment/epay_configuration.php and replace this line:
<option <?php if($this->element->payment_params->instantcapture == 1) echo "selected=\"selected\""; ?> value="1"><?php echo JText::_( 'HIKASHOP_NO' ); ?></option>
by this one:
<option <?php if($this->element->payment_params->instantcapture == 0) echo "selected=\"selected\""; ?> value="1"><?php echo JText::_( 'HIKASHOP_NO' ); ?></option>