Generally throughout the ConservationSA website the articles appear in order of "newest first". Other choices are title or author alphabetical, or most hits.

Sometimes you may want one article, maybe an intro or overview, to remain at the top of the page, and have subsequent articles appear in date order.

To achieve this simply 'tweak' the 'Created Date' in the article parameters to some date in the future (eg 2015). That way it always thinks it is the newest article and stays at the top.