I have just come across a coupon problem which I am unsure on how to fix. It seems to me like it might be a bug.
I added a coupon to the store with the top category denied, and just one item allowed. The coupon was created three different times first at the amount of the store item which was 2.35, then at 3.00 in the hopes it would rectify the problem and then with a new coupon at 4.00 hoping it was just a glitch.
Each time when trying to purchase the item with the coupon, there was 1c left over instead of being 0.00 left over like it should have been. See screenshot below.
Anyone have any ideas what the problem could be or is this definately a bug?





