I'm fairly to with Pastel, so I am not sure if I am missing something - but it's most likely something stupid that I am not doing here.
I had a customer that purchased some items from me. So a invoice was created, printed and updated. Then I realize (after a few days) that after he has paid, I had the wrong price on the invoice all along. So, I created a credit note for this customer for the difference in price. If I now click on the "Customers" link on the left of the screen, I can see that this specific customer doesn't owe me anything. But, if you go to Process-> Cash Book -> Receipts, and make as if I am adding another payment for this customer then it still shows money outstanding on the original invoice. This has got me baffled. It is as if the credit note isn't being applied to the open invoice or something. Any help here would be great!