ORIGINAL: Allfat
To fix the aileron difference, just screw the clevice onto the control rod more. This will decrease the overall length of the longer control rod and hopefully fix your problem. You could also unscrew the short one to make it longer.
That won't fix the problem. The problem is that the torque rods no not come out of the wing at the same angle. This causes built in undesired differential. Never had to do this before but offsetting the arm on the servo slightly MIGHT fix this. The best way is to correct the torque rods but you would probably break something attempting to do so. Result is that the plane will roll in one direction better than the opposite.