Why did an ancient episode go live?

Sometimes I splurge on one of Libsyn’s larger packs for a month, and it lets me check my stats on an episode by episode basis. I noticed no-one had downloaded the excellent “Tale of Thangobrind” by Lord Dunsany in the last six months. Checking it, I notice it was set to load then expire, so you couldn’t download it. I changed the settings, so you might get a classic episode in your podcast feed. Transcripts have been available the whole time.