Continuity mistake: In the scene where Bess, George and Nancy are talking about cowboys on the ranch, Bess mentions how Ned, Nancy's boyfriend, is going to be jealous, but this is book 5, and she doesn't meet Ned until book 7.
7 mistakes in Beetlejuice you never spotted
10 biggest mistakes of 2017
A new menu and more - thoughts welcome...
25 biggest mistakes in classic Disney movies
First pictures of Josh Brolin as Cable for Deadpool 2