Our Confluence App Content Tools for Confluence provides a macro “Content Tools – Ordered lists” that allows you to automatically order your default Confluence lists.
To utilize the macro, just add it on a page and move your existing lists into the macro or create a new lists within the macro and publish the page. The next time you view the page the list items are rendered automatically in a sorted order. The macro also offers an option to reverse the order (alphabetically descending instead of ascending).
More information