You pay your Media 24 account every month via a debit order

You pay your Media 24 account every month via a debit order. Suddenly you are double charged ie two debit orders. You are told you are late as the account is paid monthly upfront. Apparently a system issue. How is this possible after 9 years and I may recall a similar concern some time back. It feels like a 13th cheque is created. Anybody out there with the same concern.