‘The Bills have allowed only 13 points a game at Ralph Wilson Stadium, and in six home contests have 12 interceptions, 6 fumble recoveries, and 19 sacks. ”I wish I could put my finger on why we’ve played better at home,” Bills coach Mike Mularkey said. ”We’ve played more consistently in all of the games with the exception . . . We lost to Carolina on a last-drive effort by those guys. We’ve just been playing consistently. I don’t know if it’s confidence.’