the problem occurs on the https transfer to the secure checkout page. The cart transfer form does not transfer either the coupon or shipping.
to fix this edit the cart_checkoutphp file. Change the following line:
[php<input type="hidden" name="Size_<?php echo $JULES_Index; ?>" id="Size_<?php echo $JULES_Index; ?>" value="<?php echo $JULES->DisplayInfo("Size") ?>" />[/php]
to:
<input type="hidden" name="Size_<?php echo $JULES_Index; ?>" id="Size_<?php echo $JULES_Index; ?>" value="<?php echo $JULES->DisplayInfo("Size") ?>" />
<input type="hidden" name="ship_method" id="ship_method" value="<?php echo(isset($_SESSION["ship_method"])?$_SESSION["ship_method"]:"") ?>" />
<input type="hidden" name="discount_code" id="discount_code" value="<?php echo(isset($_SESSION["discount_code"])?$_SESSION["discount_code"]:"") ?>" />