Great picture, BTW
Just to clarify what I have been using for terminology;
The metal horizontal piece the window tabs bolt to, I have been calling that piece the "regulator arm".
The vertical part is the regulator track, the plastic pieces are the arm guides.
When the arm is pulling away from the track....
That is the main reason for the "spacer fix"
From your picture it looks like just a few on the bottom track bolts will do.
The other (or same) reason for the spacers, especially at the bottom, is to align the track with the path of the window glass.
If the glass has a tendency pinch the rubber weatherstripping...or push outward....
Please wait for me to upload crude drawing.....