I would try swapping the RS board in that hall station with an RS board from another hall station (re-address each appropriately). Also, with your tool were you toggling any inputs or outputs on and off? If you toggle inputs or outputs while the car is running, any input that is activated by passengers will stay active even after unplugging your tool. For example, I had a bad nudging buzzer. I turned the buzzer on with the tool to verify it was bad, when I went down to the car, every car call was lit and the car wouldn't move. Sounds different than your situation, when messing with inputs or outputs, capture the car. Also, clearing PF Ram and cycling mainline clears active inputs/outputs.