At beginning of the movie as the last witch exits the canoe she steps off to the left side of the screen. Ten minutes later when the scene is revisited, she steps off to the right side of the screen.
Right at the start, when the last witch begins to exit the canoe, which hand her lantern is in changes back and forth.
Girl unties her shirt and flashes a guy, then her shirt is retied without her tying it again.
The clock on the wall changes times numerous times during each scene.
Reflected on the side of the car and windows as the group gets out of car at campgrounds.
Before the two guys walk in to talk to the guy about renting the cabin, the walk right in front of two lights set up on tripods on the left side of the screen.
Cameraman's shadow visible as the guys get into canoe