It now features every post,
Yes, that is a bug and I'm working on a version that will fix this. But since my last estimation of the time I need for the repairs, I have found one or two more problems which are related to the category feeds and which I would also like to fix with the next release. I will probably release a bug fix version this week.
to the "multiple feeds concept":
By default a WordPress blog has one RSS, RSS2 and ATOM feed for posts and for comments. It also gives you feeds e.g. for each category.
But the feed with the slug name podcast is (and has always been) an additional feed to a WP blog. podPress has added also a feed with the slug name premium. Since v8.8.5 beta 3, podPress offers also a feed with the name enhancedpodcast and torrent. Both feeds were ATOM feeds by design to allow multiple episodes per post element in a feed. Furthermore their had have a file type filter. The enhancedpodcast feed contains only .m4a and .m4v files and the feed with the name torrent only post with attached .torrent files.
But until 8.8.8 there was no way to change for instance these file type filter rules. It was also not possible to adjust values like the title of these feeds to give the listeners a better understanding of the content of these feeds. It was only possible to change the title and the description for all the feeds with the exception of the category feeds. podPress had (and still has) for those feeds individual configuration pages like the Feed/iTunes settings pages for the main blog feeds.
The idea behind these new feeds options is the possibility to have e.g. a feed with posts with attached audio files and a different feed with video posts or maybe a feed with .m4a files and one with .mp3 files. Furthermore this new option section should give the podcaster the ability to control and customize these additional feeds.
For instance if you have feeds ith different file types like one for audio and one for video then you can have different description and feed images which helps the listeners to differentiate the podcasts better. Also it is now possible to change slug names of these feeds (Same podcasters have asked in this forum for a way to rename these feeds.).
I turned them all off,
That is also possible for the first time. But you are right, the feed with the name podcast is your /?feed=podcast feed and if you deactivate it, it is offline.
And if it's meant to be the same, why I am asked about iTunes metadata twice, once above the feed settings-accordion, and once again within it.
You should do that because the form above the feed settings-accordion is from now on only for the main blog feeds and the feed settings-accordion is for the additional feeds which are added by podPress.
It would have been probably be a good idea to copy the data from the old form to the new ones during the upgrade process. I'm sorry for the confusion and I will try to add further information and explanations to the readme file and the changelog page.
is it safe to downgrade podPress?
Yes, but you should save the Permalink settings and the widgets settings after downgrade. Because the widgets are working differently in v8.8.8.
You report and your question helped me to understand the problem better. So, thank you!
I'm working on it and I will report back as soon as I finish the patches.