With spontaneous conversation, do you honestly instantly check everything that comes out of your mouth?
It's like assuming that somebody who works for CNN is aware of every single news item that exists in their entire network.
I happened to hear about the Simpsons renewal long before the podcast and their comments didn't come off as disinformation. They were just commenting about what they had previously heard if the Simpsons were ever to do a movie.
I don't know if this was mentioned this week, but the Simpsons was renewed for a full two years after this season. How did I reach this information? CNET's own TV.com. Just check your own resources before speculating. A little fact checking, even on the fly since you do have a computer in front of you during the show would not hurt.