Credit appearing for Supplier
we have a bill that we need to pay for a supplier. we pay the full amount through pay bills, and the full amount is sitting waiting in the 'online banking screen' however when we go back to pay bills screen there is an amount sitting there for the same supplier as a credit. There is no credit owing. We have deleted the invoice and re-entered and the same thing keeps happening, a random Credit is sitting there. Any idea what is causing this?