girlieworks on "when posting a link to Facebook, wrong description is displayed"

when I post a link of my website's home page, http://www.mostboringblog.com, to Facebook, FB pulls some really old information from when the site was first created, and I can't figure out where it's finding it or how to make it update the information. Here is what FB displays for the site: "Most Boring Blog – Just another WordPress site
Hello world! Welcome to WordPress. This is your first post. Edit or delete it, then start writing! Author editorPosted on August 14, 20161 Comment on Hello world!"

However, all that information was updated days ago. And yet FB continues to show that old info instead of the new info. This only happens with the home page. I even tried to change the home page to a static page instead of a latest posts page, and that didn't fix it.

Any ideas on what is going on and how to fix it would be greatly appreciated. Thank you so much.