Other mistake: When Bowie and his men first enter the Alamo, Travis calls for the colors ceremony and the detail marches to the flagpole. One section is ordered to "halt", then the order "about face" is given. However, the detail does a "right face" instead.
Other mistake: When the planes from the carrier Ark Royal first spot a ship through a hole in the cloud cover we see a ship sailing along. (The Sheffield, which they mistakenly attack). Later, they supposedly spot the Bismarck, yet we see exactly the same ship sailing along through the same hole in cloud cover.