When you click on the mobile menu, you have to click on the arrow to show that menu item's submenu. If you click on the item itself, you're taken to the item's page. This can make navigation awkward when you have a full-width menu, which a lot of sites have, because you have to drag your pointer all the way to the arrow on the other side of the screen. You should be able to click on either the arrows or the item to reveal the dropdown submenu. Thanks!