When the two sailors are painting the side of the ship and end up 'overboard', the far shot shows them - as has the entire scene - on the port side of the ship, however the closeup alone shows them on the starboard side (the water changes direction in each shot).
The United States entry into World War One is portrayed as coming as a complete surprise to Ginger Rogers and her male friends. In fact, a declaration of war had been pending before Congress for days before the House and Senate voted resolutions. President Wilson signed the Declaration of War on April 6, 1917.