Did you set the menu location by clicking the Menu Location tab under Appearance → Menus?
Could you please provide a link to your site so we can have a look?
Have you created a custom menu and assigned it to the theme? That’s the best way to set your desired menu order. There’s a guide to doing that here:
https://codex.wordpress.org/WordPress_Menu_User_Guide
Be sure not to miss the final step of assigning the menu to the theme’s main menu location, as CrouchingBruin points out above — it’s easy to overlook.

Hi,
Yes, after assigning the menu it works now. It must have gotten deselected at some point.
Thanks for the help.