There were at least 2 entrances to CoB. One of them looked very much like the entrance from Down Below, and the other was near the bloodsabers. However, there was only one exit from CoB and it would lead back to where the blood sabers are... very deadly for someone in a 15-19 group who goes into CoB and tries to get back to their party... happened to me. I havent seen for myself how they changed it yet (did they make 2 diff exits from CoB or only 1 entrance to it?). We'll see I guess.