If you create a page and call it 'Home' you may see two menu items labeled 'Home'.
Atahualpa has an option to add a menu item to the menu bar to link to your home page. By default this menu item is labeled 'Home'. If you create a page and call it 'Home' you will then see two 'Home' menu items.
The simple solution is to go to the 'ATO->MENU 1 (Page Menu)->Home link in Page Menu Bar' option and blank it out.