Check to make sure your template does not have two regions that are named the same thing.  If this occurs, your template will error out and show the default template.

Right:

• <$region name="SideColumn"$><$/region$>
• <$region name="SideColumn1"$><$/region$>

Wrong:

• <$region name="SideColumn"$><$/region$>
• <$region name="SideColumn"$><$/region$>