Ok... First, You have a few different layouts, correct...
Let's take your first article for example...
http://webdesigncove.com/content.php...his-site-about
Now when you edit your article using the little

icon (when you hover over the article name, this will appear), there is a box indicating which layout the article should be displayed under. Choose one of the layouts you created.
That's it.
Also, I'm going to bed so if you need more help, I may not reply until tomorrow. Sorry buddy. I'll check back in tomorrow morning. Goodnight.