Other mistake: When Rameses places the dead body of his son on the statue next to his throne, watch as it cuts to a shot of the side of the statue. A dummy was used in this scene, and it becomes obvious. Check out his hair, which looks like plastic, and his eyes, which look like little circles.
Question: As Rameses is getting dressed by his servants, Nefretiri stops one servant and takes a sword from him. The shot then cuts to Rameses getting dressed and then Nefretiri comes to give him the sword. What exactly did she do with it: did she stab her dead son (who is placed on that statue), or did she do something else?