The C's say they are at 6D level and their communications seem to bear this out, as well as their elevated intentions and advice. There is no mention of disagreements among themselves, nor would I think there would be if they are at the level of practically all seeing/all knowing.
If staying within the C statemens: They are one soul groups of many. They might not have "disagreements among themselves" (proof? Maybe they dont tell you) but they could have disagreements with our soul groups.
All pure speculation.....