something is worn/out-of-commission. mcpherson struts cant control any cambering. If it looks like a negative camber (inside wheel wear, bottom wheel angles out), something is wrong. Either spindle, ball joint, CV, axle.. and could've been anything you wouldnt know unless you open em up. Better to check this @ a good trustworthy allignment guy, don't risk running it too long. Trust me, if you cross your fingers, the possibility of it coming off sometime isn't too far-fetched.