Adjusting windows

[neverfinished]

I searched the forum for this but didn't come across anything.
My passenger side window pops out of the the front track as it's hits about the half way point when rolling it down. I pulled the shims out of the front track and now I get another 2" or so but it still pops out of the front track. Are all the adjustments to the tracks done with shims? I didn't pull the shim from the real track because I ran out of daylight, I'll try that tonight but I was wondering if I'm going about this the right way, if there is a better way to adjust the tracks or if it sounds like something else is off.