The fun thing about Big Brother is that power can shift from week to week. When you all signed up for this, I hope you were aware of that. This is not Survivor, where as long you are in the majority alliance, you are good. In here, one week you could control the house, and the next, the person that you nominated and survived could control the house. In my opinion, BB is a more social game than Survivor. Sure, challenges will give you control of the house and safety, but how you deal with those in power is just as, if not more, important.
So yes, I hope you are aware that this is Big Brother, not Survivor. This situation will happen often this season, and I hope you all follow Rodney's mantra of the three C's: stay cool, calm, and collective.