How far away is your paper tune rig? I paper mine at 3 feet so that I will definitely get the initial "tailing" so that I know where the problem is. Generally a "too stiff" spine will tail left. A right hand tailing generally usually tells me that your rest is kicked out to far to to the left. Yes I know it's a drop away but you still have to center it correctly. ESPECIALLY with a dual cam bow. Also, what vanes/feathers are you using? And what weight head? If you find that you are center tuned well and you really think it's too stiff of a spine, try a heavier weight head. Go to a 125 if you are using a 100. May save you from having to get all new arrows as that can be kinda pricey. But I would just about bet since it is tailing right that your center shot isn't lined up well. Bring it in towards the riser a couple clicks (you don't say how bad the tear is) and go from there. That will more than likely cure your problem. If it doesn't get some 125's to see if that helps.