Selector should auto correct. If it doesnt, just put it on insp and turn the screw until the movable nut is at the correct position. When you run the car, does the selector go ahead of the car? It should move one floor above or below the car and wait for the elev to catch up. If there is a stop registered, the selector will stay until the call is answered and the car takes off again. Is te selector continually running when the car takes off? I think the 72 circuit is what signals a stop for the elev. Also, the selector contacts will also play into the circuit.