What is the secret to properly adjust the door windows so they go up and down easily? 

My drivers side window goes down fine but jumps our of the front glass channel on the way down and then doesn't want to go back up unless I assist it back into the channel.  I have no problems on the passenger side.  I must be doing something wrong here. When up, the glass seems to fit and seal properly and there appears to be an even gap between the vent window frame and the door frame.

Original glass, original rear channels, original vent frames, reproduction front glass runs (on both sides), original regulators in good condition, adequate grease applied.

Thanks for your help.