Several years ago, before I learned how to tune my arrows to my bow, I had some 3-blade Bodkins that corkscrewed something awful when I shot them. I didn't know what was wrong, so I painstakingly started rotating them and shooting them, adjusting a few degrees at a time, and watching them fly. Eventually I hit on an orientation where they flew perfectly. Dumb luck? I don't know, but I shot them that way for a couple of seasons. So I learned most assuredly that that were some wind-planing factors that were in play, and that there was a way to avoid or at least minimize the effect.