Minor changes

Bootstrap is based off of rows containing up to 12 column units. The suffix at the end of a "col*" class is how many column units that div takes up in a row.  Accordingly, direct children of a div with class "row" can only have col* suffixes that add up to 12. Previously, they added up to 12. The proposed changes add up to 20. Reduce the number to 12 to operate within Bootstrap's parameters. You can probably accomplish this by killing both of the empty divs with class="col-xs-4".