JOHN, for one thing, your fins are overtightened at the outhaul clew screw. Remove the fins, double check your mast length to be equal, measure the distance between masts at top and bottom to verify that one is not bent, remount your fins.
Loosen the Outhaul Clews so that about 1/8" of fin is sitting in the outhaul clew slot at the rear of the fin. There they should have plenty of flex and be able to move up and down the masts slightly as they twist. Should look like this:
They should work much better.