Dropdown menu navigation
Created by: jimt
If the theme is configured to not show the third layer of menus in the dropdown menus, then clicking on an item that would normally display a third layer (and is therefore not really a "page") becomes a clickable link to a page that doesn't actually exist... it shows the next page in the sequence. This phantom page is lacking the third level of navigation (and obviously confuses the Prev/Next sequencing).