Why pages being added automatically to top menu?

Hi there, I’m using Themia Lite. The problem is that every time I add a page or child page, it will automatically be added to the top navigation menu. How to avoid that? I have already checked at the “menus” and pages options and there is no ‘check” in front of the option ‘add page automatically to top menu”. How to fix it? The site is http://www.chooseweightlosspills.com