I'm not sure what happened or what I may have done to my template that changed the look from th

I'm not sure what happened or what I may have done to my template that changed the look from the demo to what I currently have? I haven't touched any html. Also, I've just tried to make changes in the admin backend. I'd like it to be at original state again.... even if I have to re-install. Please advise.

Demo: http://themetastic.com/buddypress/?wptheme=Blogs%20MU

My demo: http://prosperandgain.com/