When the 'Ghost Squad' marches onto the Sky Deck, Cody's energy detector is in his right hand. When he is show in close up, it it suddenly in his left hand. The next long shot shows it to be in his right hand again.
When Zack is on his computer, the name "Jesse Belle" keeps popping up, but on the Captain's hat later, her name is spelled "Jessie Belle" with an 'i'.
Zack mentions that Jessie Belle is 140 years old, but since the stern wheeler sank 150 years ago, and she appears to be in her 20s, she should be approximately 170 years old.