When Tamara is performing the love binding ritual, she pulls a strand of hair out of her head. However, when she places it on the napkin, an entire lock of hair appears there.
When Tamara arrives at the motel, her hair changes between shots.
At various points in the movie another female character calls her "Tamra," not "Tamara."
When Tamara comes to class, late for a test, Bill calls her 'Chloe' when he says she will have to take a make-up test.
During the scene where Tamara is tearing the love binding spell from her spell book, the page comes out clean with no jagged tears. The jagged tear where Chloe will later replace the spell into the book can be seen behind the page being torn.