I received child support directly from the obligor, but Probation still says that money is owed.

The problem is that the order requires payments to be made through Probation. Probation has no way of knowing about payments made outside that system and can't give the obligor credit without a court order. If the money is not owed to a welfare agency, you and the obligor may agree that the payments were for child support but Probation will still need a court order. Purchase of goods such as clothing or disposable diapers don't count as child support. If you and the obligor don't agree, the obligor may file a motion through the court asking for direct payment credit. You will have a chance to respond tot he obligor's motion. If you continue to accept direct payments Probation may ask the court to make your case "pay direct" and your account will be closed.