When Logan tells Beth he'd never use her, he leans in to kiss her with his head tilted to the left. In the next shot, their heads are tilted to the right.
When Logan and Gator argue, the amount of hair on Logan's forehead changes between shots.
When Neely talks to Logan while he polishes the boat, she sits down close to him, but the long shot shows them about two feet apart.
When Cody practices swimming in the pool, he alternately is (not) wearing goggles.
When Stephanie and Tom do their first dive they are implied to be the only ones on the boat, but a third diver (probably a crew member) can be seen in the water, slightly obscured by the platform pilings.