Submenu not displaying properly

Hi,

For some reason, my submenu for the Inverto WP theme does not match what the live preview looks like. My submenu appears to be spreading across the entire width of the screen (each item takes up an equal width). However, in the live preview, the submenu just lists the items directly underneath the main menu item. This problem occurs on all pages of my website. How do I fix this? My website is judgecordell.com

Thanks