Adding content to a specific page

I am having a bit of trouble adding content to this page. Something is overwriting all of the page content and replacing it with content from plugins.

This is a Genesis, Parallax Pro theme (I recently got the honor of editing this site and don’t have access to their support). I know they have a section at the bottom of the pages where you can add unique scripts, but it is being overwritten as well.

I just need to add a simple div with images below the gallery pagination.

Any pointers or instruction would be appreciated ??

The page I need help with: [log in to see the link]