Hello Gardendoctorsmike17, thanks for posting on this thread, so to reallocate the payment received to the wrong client in error, it is just a case of going into the invoice, clicking on 1 payment top right-hand corner and then clicking on the date, the received payment page will then open up, click on more at the bottom middle of the page and then select delete,  this will then remove the payment from that invoice and open that invoice up again to be then matched against correctly.