Static front page works…blog page doesn’t!

I created a static front/home page for my WP site, https://www.michaelsemer.com. It’s done using the Piano Black theme.

I set the Reading settings to Front Page: Home, Posts Page: Bloggery.

Here’s the result of trying to make a test post:
https://michaelsemer.com/blog/2010/04/29/test-post-2/

Here’s where I want it to post (and what I see when I check it):
https://michaelsemer.com/blog/bloggery/

Now, my older posts (from before assigning a static page) are still on the site (though not accessible through navbar):
https://michaelsemer.com/blog/2010/04/26/on-branding-making-a-logo-work-everywhere-it-can/

So I’d obviously like to clean up this situation so the posts are going where I want them. My Loop code looks intact, but I’m no expert, obviously. Would deletion of prior posts make a difference?

Thanks!