I have a similar problem. When I copy an invoice and save it to different number i.e. 002, it comes up as paid.
I clicked on the payment status - 1 payment and there is a credit against a completely different invoice. I unchecked the outstanding transactions, cleared the payment, previewed the invoice which seems to be Ok, but when I emailed it to the client it has paid written across it.
So, I started an invoice from scratch with a different number 003, but still the same.
What's going on?
