When admin is not online anyone is free to selftransfer to CT team and command as long as the ratio is kept by rules and that no one is complaining. Working microphone and knowledge of rules. If a person A and person B was CT's already, are there any proof that person B refused to command and stayed CT for his own benefit? After admin left, person C joined and selftransfered to CT team to make the game far interesting. If there were no complains from T players and ratio is fine, A,B and C players can stay and play together. If ratio is not fine and person A and person C asked person B to go back to T team that should be either agreed by all players in game or found a compromise there.
Person C cannot brake the ratio if the CT team is good and there are no complains from the T players. If the person B had all conditions on commanding and didn't feel much of commanding letting person A to command there is no reason to person C selftransfer to CT team and ruin the ratio, later on with person A kicking the person B, because the person B didn't command.
IF there are complains from players, only then can other operating cts use vote kick, which is only basic sense.
Sorry for going all this banter. Wasn't there, hard to see who was guilty. Cuz there is no right and wrong in this. As long as one CT commands it's fine, but all CTs must have good working microphone so they can pick it up if the commander dies etc. Also 3am? Not much of a commanding time really is it?
How many player were on the server?