Is it possible that there is only one challenge in week 8? There should have been at least one double eviction episode by now. In fact, as for what I can recall from the challenge board, I believe that for this episode they may have had a new twist where the winning tribe votes out one person and the losing tribe votes out 2 people. I'm pretty sure that the episode where Gary was medevaced in Fiji was intended to be a double boot episode but it was restructured so that the winning tribe could choose between immunity and comfort.