Q: Podcast feed shows new episodes but feed validators and subscribed itunes do not update

Hello everyone, I've run in to a fairly strange issue this morning while releasing my latest podcast episode.  When I publish a new episode, it shows up in the feed but it won't show in itunes.  I know there's a delay for the itunes store to show the episode but the episode shows when I check with a subscribed podcast app.

Here's my podcast on itunes:

https://itunes.apple.com/us/podcast/church-collective-worship/id672308308?mt=2

The latest episode can be found in the rss feed and as best as I can tell, everything looks ok:

http://thechurchcollective.com/podcast-rss

But when I look at the feed through a feed validator, it won't show the newest episode from today.

While trying to figure out what could be wrong, I tried to place the audio from today in last week's episode (108) and when I go to play it, it still plays the audio from last week even though the rss feed shows that I put a different file in the enclosure.  So for some reason, the feed is not being updated even though it is actually updating.

Thanks in advance for your help, I've learned a lot already just searching through this community.