Yeah, it's part of the PeakD frontend, but I don't think it's automatic, unless you've toggled it. On mine, I've always had to toggle it manually on my own posts to get them to show up.
Maybe it doesn't really matter. But look what I'm saying:
On your main "blog" page:
Here, this "proposal 25" post doesn't show up. What I can see is your reblogs, and your "most recent" original post is this one:
Instead if I want to find your excellent thoughts on proposal 25, I need to navigate further, to this one instead:
https://peakd.com/@azircon/posts
From there, I don't see your reblogs, but I can see three posts that you've authored, that are all more recent than your community post with the Outliers image.
I think there is a toggle switch at the top of the PeakD interface, which lets you decide if it's reposting to your blog after posting to a community.
Anyways, maybe it's not that important, but I thought it might be helpful to know. I do it for myself so I have one clean reference, but I've only published 6 blog posts so I don't have much of a backlog.
You are correct. However, I just look at the link above. My browser is set up that way.