Why a repeat of a repeat?

Yes, I know that this is not really a car question, but I would still like to know why this week’s Car Talk radio show is a repeat of last week’s program, which of course was a repeat of an earlier program.

Whether this screw-up originated with my local NPR outlet (WNYC), or if it was broadcast nationwide, who is the hockey puck who fouled up the programming?

This happened on my local affiliate a few months ago. All of the Saturday programs were the ones that aired from the week before. Someone at NPR probably sent the wrong show #, or someone at the affiliate downloaded the wrong show #.