I have 22's also, mine shifts different sometimes but i have had 18, 20, and 22 inch rims on it so im not sure what it could be. but i have been riding wit the 22's for about 2 years and no major problems yet.
I have 22s on my 04 gt2 but took them off after about six months my car started shifting different so im not sure if was cause of the rims or what but it's fine now. also I had to use 1/4 inch spacers on the back cause they rub the strut tower