Advertisements (Ads) are generated in the right side of your post so there is nothing you can do with your formatting problem. It will usually look like that with the ads. Generally these ads helps Garth to pay forum bills lower than he originally payed.
Also you're using adblocker so you see a big blank space in the right side which is usually for a ad placement.
Here what it looks like with without adblocker: http://i.imgur.com/UaaethK.png