My passenger window does not stop where it is suppose to and continues up. It also rolls down uneven. I have had it fixed at two different place in the past few years and it still continues to not stay in place when it goes up and down. I don't use it because of the problem, I'm sick of having to push it back in place. I had the arm replaced twice already and I'm sick of it! What is going on and how can I permenantly stop the problem from occurring. I still can't get it lined up and there is a sliver above part of the window where air comes in and out. It is a 2001 mustang coupe. If anyone out there has the answer, please help.!