Ghost Ship (2002)

Revealing mistake: When the crew are getting ready to load up the gold, one of the crew slams the crate lid making the gold bars "move".

Epps: After you.
Murphy: No, after you.
Munder: No, no, no, no, no. After me.

Trivia: The studio and producer Joel Silver reportedly called for major re-writes of the script shortly before shooting began. Many of the actors had signed up based on the original script, titled "Chimera", which contained far less violence and supernatural elements, and instead was a psychological drama about what happens to a salvage crew when they are stranded in the middle of the ocean. Much of the cast wasn't informed that the script had been almost completely altered into a more generic supernatural-horror/slasher film until just before they showed up to begin filming, leaving many of them disheartened and disgruntled.

Question: Why does the demon kill the salvage crew before the boat is even fixed, and why couldn't he fix the boat himself if he already has the ability to move objects?