Showing Old Content

Hi there,
I run a online magazine/blog and we have recently been encountering an issue where our newest posts don’t show up either on the front end of the site and the admin section. We post every week and currently the site is loading posts only from September and the admin section is the same. We thought originally it was a cache issue, we’ve tried clearing browsing history, data and cache, using several different web browsers including a third party web browser as well as trying several different articles. We want to be able to retrieve those 20+ articles that have not been showing up, plus all the media that was uploaded in the library. Please let me know if anything can be done. Thank you!

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