Play-off chasing Scunthorpe twice came from behind to pick up a point in a 2-2 draw with Northampton.The Cobblers took the lead against the run of play in the 13th minute when Chris Long converted at the back post after Matt Crooks had flicked on a free-kick in the box.Although the Iron rallied, they struggled for quality in the final third, until Funso Ojo found the bottom corner from 20 yards after a driving run through midfield just after the half-hour.Having got men behind the ball to frustrate the home side, the Cobblers hit Scunthorpe with a sucker punch in the 57th minute when John-Joe O'Toole powered home a header from a corner.But the Iron also underlined their threat from set-pieces with defender Murray Wallace rising highest above a scrum of players to head home his side's 76th-minute equaliser after a free-kick had spun high into the air.Buoyed by the goal, the Iron piled forward in search of a winner, but Northampton goalkeeper Richard O'Donnell preserved his side their point by brilliantly pushing away Josh Morris' late free-kick.