Despite a porous run defense Houston still beats Kansas City

Houston beat Kansas City 35-31 despite a poor effort by their defense particularly their run defense.  Matt Cassel threw 3 TDS and 0 INT, Thomas Jone (100 yds, 1 TD) and Jamaal Charles (93 yds) both ran through Houston but they still lost.  Houston's run defense was poor all round with the PFF guys scoring them team a -15.5.