Flieger,

Are your control arms setup the same? Rods the same length and connected in the same hole on the aileron and servo?

You are setting up the amount of travel to be higher up then down? I don't know if you can do that with a Y harness. With the Y one sides up is the other side down. So if you set up the left side to have 3/4 down then the right will have 3/4 up which means when you put the left side at 1 in up the right side will have 1 in down.

I understand you have flaps already setup on ch 6 but is there another channel open that you can put a servo into and connect the two servos seperately?