I have the exact problem...I have plaed the last few levels of the game SOOO many times but STILL no achieven=ments for these!

I beat the game in Heroic...and no Heroic Achievement!

The last 3 levels seem to not register...Cairo Metropolis or Arbiter achievements never register, and consequently I dont get the one for beating the game n heroic...Any sugestions????

My gamer points keep going on with all my Xbox 360 games, so its nnot my account...Any sugetions?