Sage 100

A client running 4.5 posted 6 cash receipts. They say the total went to the GL correctly however, the first entry posted twice to the customer file and the other 5 receipts didn't post to the customer file. 5 invoices show up still outstanding and one customer now has a credit balance due to the duplicate receipt posting. What is the easiest way to fix this?

First I would turn off the integration from AR to GL so my corrections to AR wouldn't double the entry to the GL. Then post a cash receipt with the 5 missing deposits and a negative entry for the one that updated twice. Update and then turn back on the integration to GL.

Don't forget about Bank Rec module.