I had a look at the ships and must say I dislike the sails very much. They are very irregular this may look like fluttering in the wind but sails should not flutter. If they do the crew does a terrible job and the ship will not move. A sail full of wind should be very smoothly curved like this:
Also I'm very sure they did not transport stuff on the deck. They needed all space for sailing which is hard work. Also in case of a storm goods on deck are very dangerous.