Original width were incorrect. Grid is now calculating itself.

Added @margin, @row-one-width, @row-two-width, @row-three-width, @row-four-width, @row-five-width,@row-six-width, @row-seven-width, @row-eight-width, @row-nine-width, @row-ten-width, @row-eleven-width, @row-twelve-width variables to grid.less.

You should write this for your grid.scss too!