You’ve got four options to sort by page title, order, date and ID. If you are going to sort by page order, like I did, you need to be sure that the sub-menu pages are ordered properly below the primary menu item. (When you choose the page template, you also have the option of choosing its order)
For example, if the primary menu item is ordered as #4 in in your main/primary menu, then the submenu items need 5, 6, 7, 8 and so on.
