not minus from the amount of coupon but it add the amount in to it

[jikey]

i having a problem which is

when i use the coupon it did not minus from the amount of coupon but it add the amount in to it

any 1 know how to fix it ? cos i hav no idea what suppose to do wih it

[dbltoe]

Make sure you entered a positive number in the amount.

10% and 5.00 will work, while -10% and -5.00 will actually add.

[jikey]

i think is during edit the invoice when save it. then it got happen.