Posts are being duplicated?

I tried to do a search but all I could find were issues related to the Duplicate Posts Plugin.

Anyway, running a sub-domain multisite install on the latest version of WordPress – 4.4.1. Anytime I add a new post, when I view the post, it displays every post I’ve created (in this case it’s just two). It’s almost like it’s taking whatever post was most recently published and making that the “posts” page. To complicate things slightly I have created my own template to display all posts by date and title link. On my two other sites, the posts and my custom template are working beautifully – live site here and the better example of working but “not live” here.

The site I’m having troubles with: WordPress Posts Page which looks correct.
Actual post here which looks just like the posts page.
My custom template here. On the template you can really see how it’s duplicated. The template also appears to be pulling the title of the most recent post as the page title instead of displaying the page title as it’s written.

Any thoughts on where I should be looking? I’ve confirmed all Theme Options and all Settings are correct between the three sites. All three are using the same child theme and styles so I’m not sure why this one site is off. Thanks in advance.