The directory provider isn't perfect. As a Windows Media Center diehard, I recently switched my guide data provider from Microsoft to Schedules Direct. The latter reportedly uses the same provider as the Recast.
At least two of my OTA stations had incorrect data. The interesting part of subscribing to Schedules Direct is that they can contact their upstream provider to ask for corrections. Us normal peons can't do that.
Hopefully, in a few weeks they'll have my stations sorted out. (DABL and CourtTV Mystery were recently added in my area.) <fingers crossed>