FIXED!!!! 
First, I had analog unchecked and was still getting the center nudge (screen shake and ball moves upwards) with rapid flipper movements. I came along a post by Jimmyfingers saying multiple analogue nudges can trigger a center digital nudge. Not sure if this is what he was talking about…but closest thing I can think of. But not sure why it was nudging when I had it turned off…or so I thought. But then I saw a comment in vpf forums to disable x and y Axis under keys/nudge. THAT is what worked for me. Once I disabled it, no more unwanted center nudges and tilt. Obviously, I do not get analogue nudging, but well…like most never got that to work well in VPX anyway. So, there…if anyone else ever gets this problem, point them here.
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