I was not using the wp-admin panel > Apperrance > Menus, because when i use it, the associated button to the page i’m on, stay yellow.
To manage the menu i was using the order of each pages in wp-admin panel > Pages. And the buttons gone into yellow only when i have my mouse on.
But using menus, fix my “register button” problem.
So is it possible to use the menus while having no yellow effect on my menu buttons when i am on a page?