Corrected entry: Cal leaves the necklace in the jacket, and Rose later ends up with it. The elderly Rose says it was a dreadful heavy thing. Yet, she doesn't notice it is there until she is already safe aboard the Carpathian. Surely Rose would have felt the weight of it before then, especially with the coat being soaking wet.
Corrected entry: The floors of both the Smoking and Dining Rooms used linoleum tiles in real life. Not carpets, as seen in the movie.
Corrected entry: As the ship's stern is rising, furniture is seen crashing towards the bow inside the ship. One piece of furniture is a bed, which slides down with the head and base facing the port and starboard sides of the ship. Rose's bed also faced a side of the ship. On the actual Titanic none of the beds in first class faced a side of the ship, they were always facing the bow or the stern. The proof of this can be seen in first class deck and furniture plans. (02:33:20)
Corrected entry: When we see the old couple lying on their bed waiting for the ship to sink, the water rushing in under the bed does not rise. (00:22:35)