Continuity mistake: In season 2, Doug mentioned that he hadn't seen or spoken to his father in 22 years, since he was twelve. But when he's going through his father's things at the motel, he finds pictures of himself from high school. Plus, he mentions his father teaching him how to drive when he was about 13 or 14.
Suggested correction: He said he was 13 or 12 no mention of 14.