Sounds like yet another great use for duct tape, or anything that will cover up everything except one dot, I'd try that if you think the target is the problem, something I've been waiting to try is covering my dominant eye while shooting I seem to be a lot more accurate when I can get "coned in" vision wise and actually concentrate on the target with both eyes instead of just seeing the target with my non dominant eye, hope you figure it out, if not I'll buy that bag target for a reasonable used rate LOL.