Well it depends on how you look at it, I suppose. If you want to know the odds that Miley faces a specific member of the remaining 15 players in round three, then it is a 1/15 chance. The odds that the pair of Miley and Allers are going to meet in that round are 1/8 I suppose, but really since it is all supposedly randomized I don't see why making pairs would be a good way to go about it, since that would require knowing that they'd meet there already. If you wanted to know the odds of them meeting in that exact pool, then it would be 1/8 * 1/7 = 1/56.