Solved
INCLUDE CLOSED SALES
When posting receipts to a customers account there appears to be an issue with closed sales appearing if a credit memo already exists on the customer account. We have a customer who has paid by i...
I remember this issue, in short the Receive Payments window's "Include closed sales" function only allows you to pay a closed Invoice once, the second time the Invoice will no longer appear.
There is a workaround to get this to work, here's a link to a forum post on what to do: allocation of payment for invoice already closed invoice with credit
From memory this is listed as a feature from the Classic Software, but there it is being looked at to change the existing behaviour in the future. I don't know exactly where they're at right now, though I'd expect these kinds changes to come after the major releases they're working through right now.
