In the scene where Paul is the hotel room, he removes the door slide bolt from the dresser and puts it on the door. He only puts one screw on it and its also positioned awkwardly. In the next shoot, there are two screws on the slide bolt with it placed correctly on the door.
Near the beginning when Paul and Barbara are trying to get to the village in an inflatable raft, Barbara is clearly on the right side and Paul is on the left, mounting his oar. At about 16:38 the scene cuts and they are on opposite sides.