Imbalance 2 theme problem with column

Hi everyone,

I am having problem with the theme Imbalance 2 which is supposed to be a very nice grid blog. However, mine just has one column pushed to the left. Anyone has any idea why?

http://chandamon.com/home/

and the official demo is here

http://wpshower.com/demo/?theme=imbalance2

Thanks! Any help will be very much appreciated!