widget issue

I recently designed my blog: http://www.shopmotorbikehelmets.com/blog and after clicking my widgets to be displayed and posting my first post my appearance is all messed up. The widgets are in the middle of the page at the bottom: take a look
http://blog.shopmotorbikehelmets.com
I am decent with HTML so if i need to change something in the code I can, does anyone have advice?

Thanks.