Well, I agree with your assessment of the different shops. Some pro-shops are just scary. You ought to come to MD, its gets worse the more north you travel.
It sounds like you have ran out of adjustment if you are raised all the way up and still hit low. At this point, nocking point needs to be lowered or you have clearance issues.
Point wieght has no bearing on BH's hitting with field points. Getting some new whiz bang BH out there like G5s that are way overpriced is not your issue, as you seem to know. Just the problem needs to fixed.
Move your nocking point down 1/16" and try again. I start at 20 yards, and then I usually move out to 50 yards.
If you have clearance issues, BH's are going to make it worse. Problems get tougher with clearance issues.