The "welcome" page in your example set shows three columns immediately below the callout area - these contain mini sliders linked to the corresponding pages, with a paragraph of text underneath... In the case of the "About" page, this paragraph of text is given as "This is the Excerpt of the About Page. It will be used whenever you choose to display the page with the dynamic template builder." - I cannot see where I edit this text anywhere. (And it's not in the documentation)
I've also edited what seems to be the text shown beneath the "Sermons" block (It's the main content box on the Sermons page, correct?) - I've updated all the pages (sermons, about and homepage), disabled caching, deleted the cache - but I cannot get this text (on the home page) to change.