I logged into your site to try out again.
For a brief moment I was able to see things work properly.
I taken a look at your site via firebug console and I can see that no matter how I refresh your site. It shows 304 not modified on in the console.
This means your server is loading cache data.
Please see screenshot. http://i.imgur.com/jx4Q0XJ.jpg
Do you have a server cache program?