This isnt true. BB is the same as BB and RB and BR. BB and BB could be two different black numbers, but it wouldnt matter anyway because they have the same odds on each spin anyway.Steve you didn't probably understand my explanation. Agree with you that BB is the same as BR or RB or RR. The point am saying is that is only when you consider the sequence.
We know there are 4 possibilities of spins. However seeing 2 blacks (BB) is rare than seeing 1 black and 1 red (RB, BR) because it can come in two possible sequences as opposed to 1 possible sequence. So the odds of seeing two blacks are 1/4 whereas the odds of seeing one black and one red is 1/2. Do you agree?