I have an invoice for £81.48
Client paid £132.60 an overpayment of £51.12
I have an invoice for £690
Client paid £575 an underpayment of £115 BUT system has used the £51.12 overpaid automatically against this invoice.
I don’t want the overpayment automatically used against the second invoice as the underpayment is going to be paid in full shortly.