Hi, using a personal test account, I have a $10 GC balance. When trying to purchase some products using the GC, the amount available appears correctly. I apply all 10 (or part of the 10) in the Apply Amount box and continue to the next screen. When I look at the order total, it shows the $10 has been subtracted (below tax and shipping lines), yet the order total is actually much, much higher than it should be. For example, products totaling $125 are added to $5 shipping and $10.31 in tax for a subtotal of 140.31. The $10 is applied and the new total comes out to be $260.31...what am I doing wrong--please help!