Maybe I missed something here, but in This Side of Paradise, what provokes Kirk into finding out that anger will overcome the spores is the fact that no one is there to transport him down to the colony. He realizes that he is stranded because he cannot simultaneously operate the transporter and beam down. He states that he is the last person on board.
So...how did the last mutinying crewperson get down? Wouldn't this person have had the exact same problem? Kirk wouldn't have participated in the mutiny by beaming that person down, presumably. Am I missing something?