Character mistake: Paul tells Marcy he's leaving her to go look for Jeff. But soon afterwards, when Paul hears Marcy's dying screams, he runs back to the cabin from exact opposite direction to the one Jeff went when he ran off into the woods. Paul watched Jeff leave, so he would've known what direction he should've been searching in. (01:05:50 - 01:11:10)
Character mistake: When Harold is recalling Michael's 'credentials', he refers to Hilcrest academy, claiming that Michael killed four students. However, Michael only killed two; Sarah and Charlie.
Character mistake: In the scene in David's office, David tells Jessie that Marius is as "close as we have come to the original vampire" then gives her Lestat's diary which states that the original vampires are Akasha and Enkil.