You have to types of footer widget poritions, one with a light background (Footer Light) and another one with a darker background (Footer Dark)
These positions are not visible on your site unless you add some widgets into these positions. They will automatically calcualte the number of their columns, so you can add one, two, three, four or six widgets into them and they will columnize your widgets for you. (This theme is devided by 12 columns, this is why you can not have 5 columns on your footer widget positions.)
To activate these footer positions, just add some widgets and they will appear.