Continuity mistake: At the Fort, the two columns of soldiers separate and Norrington walks into view. It's shouted, "Right about face," and the soldier behind Norrington on his left has his black bag to his side. When "present arms" is shouted, the soldier's black bag is in front. Also, Governor Swann, in the front wide shot, is standing on the second step from the bottom. In the next close-up, he's standing on a step further up - the soldier to his left in the previous shot was standing on the same step as him.
Picture added by Sereenie