Continuity mistake: There are six girls and Sister Charlotte and Father Massey in the bus heading for Mullins' house. When it cuts to the bus which is seen from a distance, two or three girls are suddenly missing through the windows. (00:09:35)
Continuity mistake: When Janice is on the stairlift on the second night, just as the stairlift stops, we see her looking over the arm of the seat. Camera changes and and she is no longer looking over the arm. (00:49:00)
Continuity mistake: When the cover is replaced on the well it is placed slightly off centre. When the angle changes the cover is now placed perfectly. (01:14:00)
Factual error: Sister Charlotte listens to Janice's confession. Only a priest is allowed by the church to hear confessions.
Continuity mistake: When the girls find Esther Mullin's mangled upper body half nailed to her bedroom wall she has on a pink sweater. Later in the basement scene when her upper half is crawling towards young Linda she is wearing a white blouse.
