Well, the shade's been off for a month or so but since the temps are now into the 90s, my daughter said it is getting very hot in the car.

So I put the shade back in today.
I turns out that the thing that was preventing it from sliding back into place was three foam pads that are located at the rear side/bottom of the sunroof frame. They are probably there to prevent rattling. Anyway, what was happening was the rear of the shade was hanging up and couldn't get by the foam pads. I removed the pads and the shade went in fine.

I told her to see if it rattles. If it does, we'll come up with something else. But for now, at least she has some shade. She'll have to pull the shade back manually when she opens the sunroof, but she says she always did that prior to opening the roof anyway.

I guess the problem is solved. Reiterates my opinion that sunroofs are a pain. I never liked them any could live without them.