I don't get in here much so sorry for the late reply. I have run in to the front sway bars on 107s' causing just what you have. Yes the bar should be th same on both ends. I can't tell you why this happens but it does. Since sway bar is really a big spring I would suspect that it has been sprung some how. Replace the sway bar and all will be well. Of course put all new rubber mounting hardware on it too.