Am I remembering this wrong? (spoilers)
At the end when the servants return to the house, right after Grace tries to shoot them: they are talking to her through the door. I recall from previous viewings that as they are talking to her, they walk *through* the doors.
I just watched it again and they stay outside the doors. Does anyone else remember them walking through the doors?
It would make sense b/c at that time she thought they were ghosts, plus there is the symbolism of her not being able to keep the light (truth) out any longer by locking doors and not being able to keep the (truth-telling) servants out either by locking the door.