One of the office people here is telling me that they went to AR-C to record a payment on a few invoices. It marked the invoices as paid but did not actually add any money into our undeposited account like it should. And so, the invoices are all marked paid but the system seems to think that we didn't actually get any money. Other invoices processed around this time are fine and do show up in the undeposited account. How is it possible to fix this or figure out what happened?