Hi dannyhunt,
The reason I suggested you to check the profiles because at this time, the articles seems are being assigned on the Home page layout which doesn’t contain the content section or they are still not assigned to a menu item, that is why the articles don’t appear.
The solution is creating a hidden menu item (Category blog) using the categories (Volcano, Technology…), then go to Template Manager >> Profile, and assign a profile (No to Hide Main content block ) to this menu item. Clear JAT3 cache then.
You can use an existing menu item if you want. Lets send me PM with your website’s credentials for further checking if the issue still persists.