TiVo Community Forum Archive 1 (http://archive.tivocommunity.com/tivo-vb/index.php)
- Season Pass Alerts (http://archive.tivocommunity.com/tivo-vb/forumdisplay.php?forumid=10)
-- Horse Racing on NBC crappy guide data (http://archive.tivocommunity.com/tivo-vb/showthread.php?threadid=169788)

I think this was done a protection for those who want the big race itself each year and have set up a wish list for "Kentucky Derby" within "Sports > Event" to get the event broadcast itself and not get any pre-shows.

I think this is NBC's fault for not isolating the live race as a program outside of the preview show...