Mine does the same thing. It gets pulled up when I roll the rear windows up. I don't think they get damaged, they just get wore out where it fits into the track. I mean it still keeps water out of the door, but its too easy to pull it out. I'm thinking about putting a spot of something along the line of contact cement on the rubber where it goes into the track so it will hold. Its no biggie to push it back into the track, but I am afraid one day it wll fly off while I am driving down the road.
