HUNT,
I experienced a simular problem with my Whisker Biscut rest. All I did was go to a high profile 2 3/4" vane and fletch them on the shaft to within a 1/4" of the nock or the end of the shaft.
The farther fletching is to the rear of the arrow, the flight will be much better.
I love this rest and wish it'd came out years ago. It's solve a lot of problems for me, while hunting.
Good hunting, Bowhunter57