[Steven Zahm]

@ Vasileios

Ok, I have no further ideas for you to try. I need a temp admin account so I can take a closer look. The login details can be posted here as a private reply.

Oh, wait…

I see you are using WP Super Cache. Please empty the page cache and exclude this page from the page cache. It is extremely likely this page was cached by WP Super Cache when no results were displayed and now that is the only page being shown because that is the page being displayed by WP Super Cache.