If you have a laser you can also check it. Mount the laser on the scope and zero it with the cross hair at about 30 yards. Adjust the PA and the mag and the laser dot and cross hair should still coincide.
I've had two scopes that showed POI movement. Once was completely random with the sidewheel PA (Nikko Sitirling) and got binned, the other moves slightly to the right as the mag increases and comes back when the mag is adjusted back again (SMK el cheapo). It will be getting binned as soon as I can get a replacement.
Not had any problems with the 4 MTC scopes I have had.