Unwanted Auto recording occuring from OnDemand - DirecTV

I believe I need help with my setting(s) for Series record. Several times, shows I have set for regular series record have also recorded unwanted episodes from On Demand without being (knowingly) set to do so.
This is a problem due to our limited internet. When this unexpected recording occurs, it uses up a good portion of our allowed internet for the month, resulting on decreased ability to stream shows we DO wish to see. Please help! Thanks. Jean in Ohio

This question, "Unwanted Auto recording occuring from OnDemand," is about DirecTV channels, programming, equipment, and sports.