Classic Help

I’ve been playing around with Classic a bit, lately, and I’m liking how it’s going so far. See it here : https://winnopeg.com/test/2dot0

My question involves it’s layout to date. The sidebar is under the content yet to the side – I’d like to even that out with the content but I can’t get it to work. My other issue is that it’s not centered. How can I center the entire blog?