Since Episode 382 "Her face all sharp", I've been having RSS feed issues with pseudopod on my feed catcher (Downcast for iPhone).
Every day, it re-downloads the episode 382 again, even though I've previously listened to it.
Then when episode 383 was released "This week's episode will be late", it happened to both 382 and 383.
We're now up to episode 385, and it's still happening. Every day, it will re-download episodes 382 thru 385 as if they were new episodes.
I contacted the app developer, but their first suggestion is that this is an issue with your feed. Older episodes are not re-appearing like this, and it isn't happening to anybody else's podcast either, just pseudopod, and just episodes 382 and newer.
BTW: I already tried sending an e-mail to the "feedback" e-mail addresses you have listed on the site (feedback@escapepod.org and info@escapeartists.net. I've received no responses, except an automated message from google that the "info@escapeartists.net" e-mail address was no good. You might want to look into that.