Header different on pages and editing screen has changed.

Hi,
I have a website
http://www.carringtonlodge.com.au

It was working fine until I upgraded the version of wordpress and the graphene theme I was using just now…

When you look at the home page the header is fine, but all other pages the header image is way off to one side.
I can’t work out how to fix it.

Also, when I’m in the editing screens, my space to edit is about one centimetre wide and runs like this down the page, instead of just my normal editing column. I can post a picture if that helps to visualise what I’m trying to describe.

Is there any way t undo the upgrades as I had no problems before this.

Please keep answers basic for me as I don’t understand a lot of the technical jargon.

Thanks for any help.

[Please stick with one thread per topic – add info there if needed – http://wordpress.org/support/topic/header-off-centre-on-all-pages-other-than-home-page?replies=1 ]