Futaba receiver Switching then The two are arming at the same time

ArduCopter
1

It arming at the same time when I rink two drones each.
Turn off the battery when I link

transmitter ( futaba 14sg ) Mode 2 Mode D
receiver ( R7008SB )

2

Than link same rink time batt no yet, same two. Obviously each.

3

Thanks reply
one drone turn on and another drone turn off when I rink