I have a one night stay booked for next week for an early flight the net day. I noticed that if I changed the amount of adults from 1 to 2, the rate went up. I know that other hotels do this, since they go from a twin bed to a king for two people, but in this case the bed stays the same. There will be three of us staying in two rooms, so my question is, will they try to charge the higher rate, and if so why?