Q: Most recent episode is uploading to Stitcher but NOT to iTunes?

Perhaps you haven't allowed enough time for the Store to update. Perhaps you've fallen over an intermittent bug in the Store. Perhaps there is an error in your feed. If you don't post the URLs of your Store page and feed there is no way of knowing.

Your latest episode appear in iTunes when subscribing; it can take 1-2 days, occasionally more, for new episodes to appear in the Store but yours was posted a week ago so it should have appeared by now. The feed appears to be OK, so it looks as if you've fallen over an intermittent bug in the Store where some episodes fail to appear, although all the episodes appear when subscribing. Go to Podcasts Connect, sign in, select your podcast and click 'Refresh Feed'. Give it time - the Store may take a day or two to update. If it doesn't work, contact Support and ask for a re-index: that may solve it. Go to https://itunespartner.apple.com/en/podcasts/overview and click the 'Contact Us' link at the bottom of the page.