Window & Window Regulator Alignment

[PSpuza]

I'm currently dealing with a window regulator issue that has plagued my X5 for the past year. I bought a cheap front left window regulator, and when I would roll the window down all the way it would come out of the clips and fall to the bottom.

I recently bought a URO window regulator, along with OEM clips, and I spent a lot of time adjusting it and trying to get it to run smoothly. It worked well for a few days, but when I shut the door with the window down, it came off the clips again.

I've readjusted the window regulator multiple times with no luck. Is there a definitive guide on how to adjust the regulator so it can raise and lower the window without coming off the mounting points? Any help would be great.