Like I said it's where the coaches wanted him to line up. That being said Fisher also said on his show Jenkins still has a ways to go he's far from perfect. He did not play all the slants the way they wanted him to.
Like I said, I'm not blaming Jenkins for this entirely because I don't know if its him or the coaching staff at fault but whoever is making the decision to have the corners play 10 yards off on 3rd and short needs to change their thinking.
The biggest reason for the drought was the complete shutdown of San Francisco running back Frank Gore. Following a 23-yard run early in the game, Gore was unable to get much of anything on the ground. In fact, he finished with 58 yards on 23 carries, an average of just 2.5 yards and that includes the long run early in the game.