OK. FLAPERON is for use where you have one aileron on each wing, only. When you move the flap switch/lever, then the ailerons will move together as flaps or spoilerons, depending upon which way they deflect. The Flaperon mixer will not move flaps, too. If you have a wing with one flap and one aileron on each side, then the Flaperon mixer will only affect the ailerons, and have nothing to do with the flaps. There is nothing wrong with your transmitters. If you want the ailerons to droop when you apply flaps, then you need to put the flap channel on the same control you're using for flaperons, or you use two pmixes, with one having flaps as master and aileron1 as slave, and the second mix has flaps as master and aileron2 as slave. Now the ailerons will droop when you move the flap control.