Trying to add functions to my blog, I hit some bug in the software running it, called WordPress.
I’m working on fixing it. For the time being, all links to individual posts seem to take you to the blog home page.
Sorry for any confusion. I hope to have it fixed soon.
Edit: resolved it!
For anyone with a similar bug, I found the solution here. Basically, if all links are going to the same page, update your permalinks by going to admin > settings > permalinks and click “Save Changes”. The page I linked to provides slightly more information.