When the logo appeared after the end credits, it was spilling out over the 1.85:1 screen, which told me that it must've been 1.37:1 full-frame academy for that one shot. Of course, this means that the projectionist also didn't have the projector plate set up properly. Luckily that didn't matter. The print itself must've been hard-matted to 1.85:1, otherwise that spill-over would still been going on during the whole movie.

Screens are not 1:85:1. The screen pretty much fills the whole wall. The screen masking is what frames image at either scope or flat. It sounds like the aperture plate for the movie you watched needs replacing if you have image spill from a flat print thats not matted. I have seen that many times. Sadly, most all aperture plates are not cut exactly to academy standards.

Digital projectors as opposed to 35mm projectors are alot different. They use only one lense and everything is set electronically. In fact, they are so different that they require a laptop with networking accessibility to set up.