They (some proshops) claim they cheat on AMO Draw for speed.

It definately sounds like a weak spine. And if you taking a tape and measureing from the string to the handle, then this would make sense. Sounds like you definately got to go stiffer. It sucks buying new arrows, I know. You know you could also get a new rest like theQAD, and cut your arrows. You can move that and others rests back pretty far. Not sure if you like your current rest.

Hope hunting goes better. I am off for the next 9 days for bow hunting. Hope I things right.