I also use the whisker biscuit and it does the same thing to my vanes on my arrows. I went to my local Archery shop recently to get 6 good arrows for hunting the vanes they sale on there Aluminum Easton Arrows don't wave or anything. They are a longer and more flexible vane not thick like the tru-flite vanes you can buy. I am not sure of what brand these are I have been meaning to ask and buy some extras so I can refletch my practice arrows.
The people of the archery shop even told me they have not had anybody complain about their vanes waving they even pointed out that thats what it probably is. I didn't think the two different vanes would be all that different but appears they are.
So you might want to try differnt brands of Vanes I believe once you find one you will be surprised yourself.
Good Luck