WordPress Menu Is Not Saving All of My Items, Some Have Disappeared!
Let's say you create a nice menu for your theme, save it and then view it on the front end site only to see that a portion of your menu items are not showing. Or, maybe the entire menu will not even show. You assign it to the main menu, save it but then it drops out and will not show on the front end.
What happened? Did the menu items disappear? Is this a theme issue? Or a plugin issue?
The answer is no, its a server configuration issue. Please read this detailed article written by CHRIS MAVRICOS (better known as SevenSparks) to help understand why this has happened, and what you can do to fix it. http://sevenspark.com/wordpress/menu-item-limit