have you shot them bare shaft? if not, pull the feathers off a couple and shoot them. if your shooting is all over the place, then it sounds like they're not spined correctly for your bow.
what wood are you using? are they fairly straight grained, or is there a lot of runout?
you may have to give up on that particular set of arrows, but don't give up on wood! if tuned correctly to your bow, you'd be amazed at how well you can get them to fly.
my guess is that the spines of all of the arrows you're making are way off from each other...i can't imagine getting a bunch of shafts from the same few boards being spined all the same...or even close. i'm no expert in that field, but i just can't imagine nature working that way.