ORIGINAL: mustangshooter
Problem solved, I had one servo on each flap, I went into the tx and try to reverse but I kept on having the same issue and so I simply add a servo signal reverse circuit and the problem no longer exist, both flaps going in the same direction as I wanted it to do, thanks guys.
There are a couple of ways to solve that problem. You've probably got the flap servos mounted in the wing like you've got the aileron servos mounted. Flipping one of the flap servos over so it's top points the other way would solve the problem without cost. Notice the aileron servos both either point their tops toward the fuselage or toward the tips. They are mounted that way so the ailerons work opposite directions. The flap servos must both point to the left or point to the right for them to move the flaps correctly. Install them that way and you don't need a "signal reverse circuit". What did that cost, btw?