On our store, we use a subscription with an end date as a payment plan alternative to the full retail price. We're currently running v.1.1.
I have a customer who was incorrectly charged twice last week on their payment plan. The customer used a coupon on their purchase that makes each payment $32.92 a month (as opposed to the normal $54.16 the payments would be). The customer's payments are on the 25th of each month. He didn't make a payment in March, resulting in him being past due for the month. Today he updated his information in FoxyCart and was charged $65.84 (past due amount + this month's payment). No issue here.
However, last week, he was charged separately $54.16 on both 4/15 and 4/19. The transactions looked like regular payments on a payment plan so we didn't catch this until the customer contacted us. Neither of these charges should not have occurred. Any clue what happened? I'll whisper the store and transaction details. Thank you!