When West escorts Lady Beatrice to her suite (following the staged altercation with Claude Duchamps on the patio), the upper panel of the door has a rectangular inlay. After the scene jumps from the outdoor view to inside the room, the inlay is seen to be larger & diamond-shaped (i.e., the square is rotated 45 degrees), showing that the doorway through which they entered is not the same one shown from the patio.
When Jim walks into the back room of the suite the arrow is missing from the Tiki statue, then present after he walks around the room to it.
When Jim West opens the door with the letter A in the panel, once he walks through into the room the letter A is on a higher panel.
When the man winds the clock he doesn't insert the key into the hole.