Using a Voucher doubles my order

[mikemak]

Hi, I have a product that I have also created a voucher off for. When I order the product it is calculated at the correct price (149 setup plus 99 for the first month) however - when I apply my voucher option (which is set to take the total amount off -248.00) It doubles the order then doubles the discount so it still comes out as 0.00 but is very untidy for the screen and invoice. Any ideas would be much appreciated.
http://my.gummymedia.co.uk/index.php?option=com_netinvoice&action=orders&task=order&cid=7&Itemid=91

[netshine]

Looks like you have the product assigned to the voucher field, so whenever anyone enters a voucher code it orders the product twice (regardless of whether the code is correct or not). You should only assign the product to one field on your form.