Continuity mistake: The scene where the AA couple is having sex in the van, the guy suddenly has shoes on when he exits looking for Jason. You see him supposedly putting on his pants under the covers, but no shoes.
Suggested correction: We don't see everything he does under the covers. Plus it cuts to the outside and showing him exit the van, but we are not given a time frame of how long he was in the van before he exit's it.
Revealing mistake: When Dan is gathering wood for the campfire, in the shot when he splits a log with his machete you can clearly see that it was already broken. (00:25:20)
Suggested correction: It also shows him swinging the machete once before breaking in half. A machete wouldn't be strong enough to cut the log in half with just 1 swing. The log was obviously being struck before it broke.
Continuity mistake: Outside the house when the last pillar on the porch breaks we can see Jason looking up and then to the side. When it cuts he looks up and to the side again. (01:12:30)
Suggested correction: Because he's reacting to the noise and each part of the roof falling off each time.