I am mystified

Well, a few minutes ago I was so proud of myself. I actually managed to post my logo and move my avatar to the sidebar. WhenIi preview it looks great. But when I republish nothing has changed everything is the same. I checked the template and yes everything is in it's new position. I re booted ,signed out and signed back in and still nada. Obviously I am doing something wrong. So now I will post this and see if that changes anything. Here goes.....