please help! exact same URL but completely different sites show up

I have uploaded a site to wordpress. Was all working fine for months and now all of a sudden when I go to https://www.rawrhythm.com.au and click ‘enter site’ I get two completely different pages show up.

1) the correct site with theme and graphics etc
2) same site content with no theme and graphics

When I go to this page https://www.rawrhythm.com.au/food/

I get this on firefox
https://rawrhythm.com.au/Screen%20shot%202012-01-25%20at%201.29.28%20AM.png

and this on both safari and opera
https://rawrhythm.com.au/Screen%20shot%202012-01-25%20at%201.29.42%20AM.png

* Note – firefox looked like safari as well until I logged into WP.
* I have cleared history and cache in browsers as well – still no difference

How can I know that the site will display correctly?
What’s gone wrong?