The only think linking Yahoo! and TVShows is that we use Yahoo!
Pipes to create the feeds for the shows in the preset list, and
there's also a Pipe available to the users for them to create
custom feeds for shows that aren't in the preset list.
When you run our
public Pipe and there are results, there's an "Add to my
Yahoo!" button, which links to "add.my.yahoo.com/rss?url=[FEED
URL]", is it possible that you somehow created a custom feed by
copying the URL from that button instead of the "Get as RSS"