Nested Pages + Megamenu.com

Hello,

I’ve been using this plugin for a while but i deactivated bc i seem to lose control over the menu.

I am using megamenu.com and i need to edit the menu from the appearace/menu for example to add a custom link (email, telephone, shop search) and to customize the display of each menu link.

I constantly see my pages adding to the menu, out of the hierarchical order, creating new links in the menu that i need to manually hide, delete.

I probably don’t fully understand how nested pages work and i am doing sth wrong or there is some incompatibility with megamenu.com

Please advise
Thanks