My b2evolution Version: 2.x

I made an absolute mess of trying to alter the css for the skin 'intense'. I thought that I could get out of it by adding and overlaying a new skin. That did not work so I deleted the new skin, copied the posts that I had made up to that point ( and saved them in iweb on my mac ) then tried to delete the remaining items on my b2evolution blog. There are items that will not go away and I hope that someone can help me delete them so that I can start again from scratch. The url of the site is: rolling-ball.com. Any and all help will be much appreciated. Thank you. Mark