Are they using some kind of blog software on the demo?
If you look at this article:
templates.joomlapolis.com/demo/coolness/j15/index.php?option=com_content&view=article&id=19&Itemid=27 you see that the author and publication date details appear below the title, and there's a last updated date appears below the article.
When I build an article, then view it these details appear in a box inset in the article body, not under the title. I'm wondering if this is just a configuration setting somewhere, or whether it looks this way because it's a blog entry or some kind of different module/plug-in/thing.