1995 Grand Prix sunroof question

[wxo]

This question is for anyone who owns an early to mid-'90's Pontiac Grand Prix with a sunroof. Mine is the SE model. I noticed that the sunroof on mine does not seat firmly when closed. The rear of the sunroof settles below the plane of the roof.
Then, when I close the driver's side door the pressure raises the sunroof to the level of the roof. If I push down on the rear of the sunroof with not much pressure I can cause it to move about a half inch below the roof again. Also when driving, there is a lot of wind noise coming from the area of the sunroof. It doesn't seem to leak water, though.
Is this normal(?) and if not, please describe "normal" for me.
Cheers,
wxo