Plot hole: At the end of this movie, (1988) Kristi and Katie's mother died. In the first Paranormal Activity (2006), when the psychic is visiting he says it feeds off negative energy, and Micha says "I guess we can't have your mother over anymore."
Paranormal Activity 3 (2011)
1 plot hole - chronological order
Directed by: Ariel Schulman, Henry Joost
Starring: Christopher Nicholas Smith, Chloe Csengery, Jessica Tyler Brown, Lauren Bittner
Factual error: During the sleepover in the tent Dennis gives the girls M&Ms to snack on. If you look closely you can see one of the girls eating a blue M&M. These didn't hit the market until around 1995, a full 7 years after this movie takes place.
More trivia for Paranormal Activity 3