by admin » Sat Oct 29, 2011 6:28 pm
Hello Chris,
i started to investigate this bug, the main coupon function is called from /components/com_onepage/ajax/ajaxhelper.php depending on whether you use awo or not. The total is sent with $_POST variable, but i am afraid, that having turned on "payment discout before tax" option does not concern ordinary discounts, because it decides whether to count the percentual coupons from price with or without price accourding to setting in the shopper group which in your case is most probably "show prices including taxes". Therefore this is not considered a bug at the moment, but rather a new feature where i could modify the total for your special case.
Awo counts taxes and totals from their own function and it also decides percentual coupons according to shopper group settings instead of "payment discount before tax" VM glogal setting.
I can work on this feature, but will take another couple of days.
Best Regards,
Stan