When Matt talks to Rachel/Nancy/Linda at the marina, her hair is flowing down her back in shots from behind, but thrown over her left shoulder when seen in front.
When Rachel/Nancy/Linda is knocked into the water by the waves, she is obviously diving in.
In one shot inside the cab of the tractor, the sweeper is visible behind the driver and it is not moving.
Hobie offers Stephanie a cream soda and gets one. However, he keeps it for himself and does not give her one before leaving the room.