At certain times the house loses all power, yet amazingly the security cameras wired directly to the house (with no battery backup) keep functioning.
Throughout the film they refer to this as "The Amityville house", despite it actually being a obviously different house.
On their coroner's reports Virginia's age is given as 37 when it should be 36 and Tyler's age is given as 14 when it should be 13.
The words "extreme" and "separation" are misspelled on the coroner's reports.