is your hat set up for snap view, or pan?
I get that 'stutter'when my hat is in pan mode....or if I have padlock view enabled.
Lokk in your options..(start in mouse view)...try checking and Unchecking that option.
In map controller, make sure that you haven't caused a conflict in the set up.
Are you using the SST software? You might be finding a conflict in there, too. I use the SST software..and have my hat set as POV in all modes, but assigned nothing to it in SST. My View functions are set by AH software.
The only thing that I haven't figured out how to get to work through SST are the mouse button 1, and wheel scroll on my x52 throttle. I can, however map them with the AH setup.
Keep looking gunner, I put money on one button being out of place.