Hi Mark,
Would you please kindly clear your browser cache, or use another machine to check the website? What I see is exactly what you described I should see and not the screenshot that you shared. This must be a cache related issue:

If you use the Navigation Inline element I suggest that you go to WordPress Dashboard > Appearance > Menus and add two additional menus there. Ine for the first column, and the other one for the second column.
Then you can use two instances of the Navigation Inline element. For the first one set the menu to the first menu and for the second one, the second menu.
For more information about the Navigation Inline element, please kindly read the article below:
Thank you.