Update: It looks like the problem fixed itself. I made some changes to the feed, too, to make the episode names consistent.
If you’re an iTunes user, it seems that iTunes isn’t listing Episode 2 for no particularly good reason. I’ve checked the site, the feed, and the iTunes settings and nothing seems to be amiss, but it’s just not there. For now, I recommend using the RSS feed and adding it directly to iTunes, instead of trying to use the iTunes store.
Hopefully it’s just a glitch in iTunes that will fix itself, but I’m not holding my breath. Apple continues to do nothing to address concerns about how iTunes is run, or the complete lack of transparency for the user or publisher. Currently, it just doesn’t work, and I don’t know why.