HELP!! Post disappear on front page after browser refresh & …..

Installed new wordpress site to our custom domain & it seemed to be working fine but something went really buggy along the way & I can’t seem to figure it out. Kinda a noob but have a basic understanding of coding, etc.

Here’s the problem:

When you go to the site for the first time it will load the posts. But after I log in to the back end admin site & go back to the web page all the posts disappear. If I clear the cache, all the post re-appear.

Furthermore, the post show up on initial browser load but when I log in to the back end there are no posts that I can edit but have the categories & tags intact.

here’s the site: http://www.nomadshop.net

Any insight/help would be appreciated…thnx in advance