Factual error: Shawn reports that one of the attendees of the speed dating session drives a 2004 Trans-Am. The Trans-Am was discontinued in 2002.
Continuity mistake: When Shawn and Gus are back at the office after the sorority ghost sighting, Gus talks to Sean from his desk. Shawn is just on Gus' right and Gus' head is turned slightly towards him. The camera angle changes and Gus is turned left (Shawn has not moved). Then Gus is again looking left. (00:16:40)