I was just reading RFC4632 "2. History and Problem Description" and I don't get the part about Class A with MSB '00'. That would in my understanding mean, there are actually only 64 available networks, which collides with my knowledge, that there are more /8 networks actually. The RFC also suggest, there are 128 possible networks in Class A, which would mean, there is only one MSB '0' e.g. From what I read in older RFCs, such as RFC1166 section Network Numbers, there is only MSB '0' in Class A.
So what have I missed? In case, the RFC would be incorrect, whom should I contact to correct it?