Front door changing

My in-game front door keeps changing from the one I have selected as my front door to another door that is either in another building or a door inside the building. I spend time every time my Sim leaves the lot changing the door back to the door I want as the front door. It doesn't matter if they are traveling to another lot or just going for a walk in the neighborhood. I had a pizza guy knocking on the door from inside the water heater room so the pizza guy got mad that no one came to accept the food. The only setting I use on doors is no vampires allowed. This has been happening for months now.