ORIGINAL: early in
Your center shot must be off. Those vanes are hitting something somewhere! I've been shooting a Biscuit for 7 years, and NEVER had a vane come off, ever!
I'll admit, you'll get wavey vanes if you shoot the same arrows enough, (that's why I refletch my own arrows)but eventhat doesn't affect accuracy at all. Here's howthe arrow should sit.
I have been shooting a Whisker Biscuit for awhile now and when I first shot arrows with 4" vanes, they were getting wavey, warped and distorted due to the Biscuit. I was told by my local archery pro to try 2" Blazer vanes because they were made alittle more stout and could stand the "friction" better. It made sense so I tried it. Arrows with the Blazer vanes not only didn't get distorted but my arrows flew 100% better. Give it a try.