Roll-down Door Glass Question

[69_hafton]

I'm doing the seals on my driver's side door today, and was wondering if the roll down door glass is supposed to be glued on to the metal piece on the bottom edge that interacts with the window regulator? There's a piece of rubber between the glass and the metal piece, but the window lifted out easily and was just thinking about most other vehicles I've been into the doors on have the glass secured better than this?

I didn't notice and problems with rolling the window up and down, but rattling around has been a problem because of the lack of felt on the bottom edge of the door.

I've got the factory set-up w/quarter windows and all, but I'd be interested in what are all you 1 piecers doing for this also?