[Shasown]

Informing the housemates is a standard part of the program, it is unusual the housemates gathering and being told of the nomination results hasn't been aired, thats not to say it didn't happen. According to the official website, prior to going into the diary room for nominations they were warned nominations where housemates were thought to be acting under someones influence would be deemed void. (Charlie and Rodrigo's little chats and rodrigo worried when charlie called to the diary room?)

There have been other series were major favourites were up before and even evicted, its the name of the game.

A BB twist would be to cancel the eviction for some reason, refund calls to those who have already voted upon proof, (not many viewers actually apply for refund of phone costs) or the vote could be suspended and the totals cast count towards a future eviction poll, though that is extremely unlikely.