It only says IF one of the evicted HGs cannot preform their duties, it never said that one of them couldn't...
On the other hand, it may be 6 in one hand, 12 in the other...2 Theories as already stated on this board the Jury member who wins the $25,000 would not be alouded to vote, for whatever reason. The other could have something to do with the HGs sneaking away to have fun that one night in sequester.