Help with Mobile Menu

I set up Longevity to test on our website, but the mobile menus are making for a poor visitor experience.

On desktop, the menus are just perfect. I have them setup as three (3) top items that display drop-down menus on mouse over.

The first menu item even has four (4) sub-categories that display their own drop-down menus on mouse-over. This provides a good visitor experience.

However, when viewed on a mobile device every menu, sub menu and page link are all displayed, even when you are just clicking on a post, page or photo. Thus, a visitor must scroll past 30+ menu lines to see the photo or slideshow they selected.

Here is a link to my site if you wish to look

How might I correct this?