Franklin - send me a PM if you're having issues still. I know a few ways to sort out a low tear. This can crop up from time to time with a cam & 1/2 and can be very frustrating. I highly doubt it's your form. You actually can't affect wheel timing with grip pressure since the cams are slaved together. You could with a traditional two cam bow system - heck even a stabilizer change would alter wheel timing on a 2-cam. With a cam and a half you can actually draw the bow holding (gripping) the bow at the bottom of the riser, pull it back and the wheel sync will remain the same as pulling it on your bow hook. You can definitely affect your impact point with grip pressure and you could cause a difference in tune with grip pressure, but again nothing that you shouldn't be able to tune out with the rest.
I agree that you should pay attention to the instant when the cables come off the draw stops and sync the cams there, but it's not a big deal if the top wheel lags just a little. My Matrix made me work a little to get a good tune this year, but it's driving tacks and stacking fp on top of fixed blade bh's.
Give me a holler if you need some help.
Coop