Jul 1st rent paid 6/24 electronically and have confirmation of payment receipts. Landlord states rent past due, what do I do?

We are roommates, both accounts show balances have cleared. The property is held by Morgan Properties and payment is Payment Services Network (PSN). The PSN service has had continued problems since we signed our lease in January (e.g. when checking for amount owed online (rent and utilities come as a separate bill and paid as one) the amount owed has continually showed zero, the rental manager has instructed us just pay the total amount owed (rent is known and we get a hard copy for utilities), and have done without issue, until now.) What should the landlord do to show good faith, if error on their part, for our future protection?