Site appearing in 1 column not 2

I’m editing my newest wordpress site http://www.yourcashpractice.com on google chrome and everything looks good. I’m hosing at hostgator and just did their quick install last week.

I opened up safari and firefox tonight to check it out and it appears in both of these browsers as 1 big fat column on top of a second column that was the sidebar. This is not happening in my other wordpress site, but it is running a different theme.

What’s going on here? what else do you need to know to help me out.

WordPress 3.5.1 with Jetpack and twenty eleven theme 1.5

thanks
aaron