Your homepage uses the .index template.  This template is setup as your default home page and works the same as your full width sub page.

There should be a page created for each campus with this template.  eg. the page Zion Greenbelt will have the template index.php with a header, sections, etc. for this campus; the page Zion Fort Washington will have the template index.php with a header, sections, etc. for this campus; and so on for each campus. 

The default page index.php should be your default campus.  This means your default campus will have two home pages.  One for the default index.php page and the second is the main campus home page.