OK, I think Tesla has diddled with the software again. I'm sitting in my car it's dusk.. I'm parked (P) and waiting for a person to come out of bldg for pickup. Not wanting my headlights "ON" any more.. I slide the button to OFF. The headlights are still ON. I slide it to parking lights only position, and get that only (headlights go off).. slide it back to OFF and the headlights come ON. WTF?