Thank you tubby for all your effort. To check if I have got it right, In case of ailerons, only one servo jack controls each aileron. The other one remains on standby. Only in case of a failure, the other jack becomes active.
In case of elevators, both servo jacks control the elevator, one in active mode one in damping mode. This is true during normal manoeuvres.
During large pitching Manoeuvres both follow the elevator. Shouldn’t one be in dampening mode to prevent excessive movement.