Had my bug eye WRX wagon a week now and love it!! exported it to Germany yesturday, just went to fit my new continental lights and noticed that one of the 3 studs that mount the suspension had sheared on each side!! is this common and easy to fix?

 

as to the original problem, the top mounts shearing bolts, anyone got any idea why this could of happened before i replace them! i took the car to have the tracking/alignment to be done before i travelled to germany is there any chance this could of caused the bolts to shear??