Darth Venal said:
But even with pics, you seem to be mistaken. The building behind Vader is visible out of the window in the second shot because the camera is looking out to the left, whereas in the first shot it's straight on and the building would be off to the left. So that's not a mistake.

And the first two pics of the entrance to the room, are they even looking at the same thing?

I'll grant your first point, it might be a POV thing, just seemed odd to me to have nothing and then something.

But the first two are of whatever is behind Lando, Han and company in front of the Vader dining room, the first one is right before Lando opens the door, the second a few seconds later, there's now a stairway behind Han and company! Lando's in both shots, and he's not moved except to open the door.