http://www.josephflynn.com/uncategorized/fixer-upper/ Is a Post.
http://www.josephflynn.com/donnelys-mug/ Is a Page.
Your theme has different templates for each. In your case that’s Twenty Seventeen, the default theme this year.
Looking at the templates and styling it would be a bit of a pain to change the post template to match the page, so if you’re happy with how the Page looks, I’d suggest using Pages for your content like this, rather than Posts. You don’t appear to be using a Blog page to show Posts chronologically, so you wouldn’t be losing anything doing it that way.