Continuity mistake: During the beginning of the family therapy session, Dr. Beckham confirms that Ellen's father is not attending and removes the empty chair from the circle, placing it by the wall. Seconds later, the chair is back (and remains for the rest of the therapy session). (00:35:05)
Other mistake: Ellen is shown coming out of her bedroom which appears to be in the same hallway with the mom and dad's bedroom and the sister's bedroom. However, Ellen is supposedly sleeping in the garage bedroom, not upstairs with them.