For the past three hours I've been trying to figure out why the changes I was making to my Menus were not appearing on my site.
It turned out to be this plugin !!
Every change you make to your menu, whilst this plugin is activated, is set to be published in the future ! But there would be no way of knowing that, unless you looked at your mysql database which is eventually what I did and found the nav_menu_item showing as "future" rather than "open".