How do I remove PAID from an invoice?

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?

Hello Will j, Is it using the credit you are clearing on the next invoice? Can we get you to go to the cog in the top right >account and settings>advanced>automation>automatically apply credits and make sure that is turned off. Then save and then check if you create a new invoice and then go to print preview does it show as paid?