Hi bernardo,
You have used no-sidebar from Appearance -> Customize ->Layout Options -> Content Layout. So this is also affecting your home page. So edit the front page/ Home page (where you have selected a business template). At the below there is a layout options. You may select the full width and click to save it. View below screenshot.
http://awesomescreenshot.com/03f5o5km6b
Selecting on will take effect on specific page and from customizer it will take an effect for all page.
Hope this may help you
Thank you!