I have never had problems with other themes in regards to adding a new page, then adding the associated menu item to my Primary Menu. The new page is published and set to public. The menu displays correctly when viewing the site in admin preview mode, however, does not appear in the public site.
I am trying to add the Renko Chart Programming page. It appears in the Primary Menu under Appearance, Menus. I have added it just as I have added pages, menus for years in WP.