I have a problem. while in the midst of making a purchase via paypal i was on step 4 of 4 but remembered that i had forgotten to use my $5 gift certificate and tried to go back and correct it. but when i tried to input the GC# i got a message saying that there was nothing in my cart. but yet my order history shows that the product was indeed ordered but unpaid. at that point i was totally confused on how to correct the problem. can you please help!