Operating Lionel cars, post war.

[Charlie B]

Robert, I have the 3451 lumber car, the 3462 milk car and the RCS uncouple/unloader track. As I understand things the uncoupler runs in series through both pick up shoes, while the unloader circuit goes from a shoe, through the solenoid and then to the ground, or outside rail direct. activating the unloader shouldn't activate both shoe rails should it?
Charlie