mshane,
Youknow the more I think about it........the more I lean towards cam synch. If you can still remember where you put your bow Stand in front of a mirror and draw it very slowly watching the cams. Make sure that they are both rolling over together exactly.
Without looking It' s very easy to just draw it back and when you hit a wall forget about it and shoot........You can' t tell that the other cam didn' t roll over unless you accidentally " overdraw" the bow and get it to break over.
With only one cam rolling over you will still get a valley and a wall, just from one cam and speed can be WAyyyyyyyy off.
It' s very easy to not notice the other cam not making it to full draw if you are just assuming both are hitting at the same time.

Check this and at least set that possibility to rest.

I know you are not a basher......and I know you are not out to get anyone.......I am glad you understand the seriousness of these types of posts, and I' m glad that you are willingto keep an open mind about the situation.
Please keep me informed as to what you find.