I'm not sure if the challenger is the same but on my windows there are three bolts holding the glass in place with plenty of room for adjustment, my passenger window did the same thing and it was just a matter of trial and error to get it right. I had to lower the window to get to the nuts and raise it to check the fit...several times like that and all was well.
Let us know if yours are the same.
Let us know if yours are the same.