rss feeds not showing current posts

I was using google feed burner to manage rss feeds for 2 podcasts. I am trying to switch over to built in feeds with wp and in combination with bluberry podcasting plugin.

The problem is the url shows current posts from this week but the url does not show current posts. This is the feed that has all the extra things itunes looks for when fetching the podcast episodes but the most recent one is several months old.

How do I get the rss feed to refresh with current posts?

this is part of a multisite install and another domain seems to have the same problem.