double menus showing up

when I select a menu item from the first screen, that has sub menu's, these submenu's are displayed twice on the main categories main page. For example, I have a menu structure like this:

About Us
Staff Page
Directions
Zion's Brochure

Now, in the mobile site, when I click on "About Us" from the main page, it shows at the top of the resulting screen

Staff page
Directions
Zion's brochure

Staff page
Directions
Zion's brochure

then the content for the About Us page is displayed. Why are there 2 submenu's displayed?

Thanks!

I fixed this by using the Advanced Module Manager plugin to exclude certain menus.