During the time when CBS had "The Pat Sajak Show", were there any CBS affiliates that carried both that and the more-successful "Arsenio Hall Show"? Toronto's CFMT carried both series, with Arsenio at 11 and Pat on a delay at 12 Midnight:
http://www.youtube.com/watch?v=QYLtY9Q9EmE&feature=share
http://www.youtube.com/watch?v=QYLtY9Q9EmE&feature=share