Generally, when the name of any menu item has more than 1 word, there are high changes the words get wrapped and get to two rows.
Example screenshot below of what happens when the menu has few options wrapped to the second row:
Instead of using spaces between words use it will work.
like 'Spaces Between' should be written as 'Spaces Between'
Check the video below which will give you an understanding of how to have a menu bar on your Brilliant Directories Website with one row only.
Hope this helps. If you have any questions or need any kind of further help, you can always click on the chat button on the right-hand bottom side and say a hi!