BTW your plastic guides are not loose, they are attached to the arm.
That is the window pulling the regulator arm away from the regulator track.
or the door panel pulling the track away from the glass? Same thing!
Small Tip; I found it easier to put the window and tabs in place, then glue and close the window to set in place, before the glue sets.
That way the glass is centered to the opening. no waiting!