No all three movies were playing on different screens but they were all the same Samsung model just different sizes and the same glasses. I didn’t ask to see if there were any “alignment settings” or anything like that. Also the glasses appear to be powered as when switching one of the screens from 2D to 3D is gave a popup reminder to turn on the glasses, but they were on the whole time.
For the “Monsters vs Aliens” the picture stayed pretty good even as far off center as any normal couch would be. I couldn’t look at the “Avatar” picture long enough to really gauge it’s 3D quality. Though for the brief time I did look it seemed more subdued and natural the “Monsters.”