EJ#1 is good, for unsportsmanslike conduct or initiating a fight, but not MC.
EJ#2, ignore assistant's remarks until it is time to dump them for remarks. Any coach, HC or Asst who says to me that I need to read the rules is a goner.
EJ#3, not enough info. What is an "altercation?". Your partner did not dump anyone involved in this altercation, but you dump someone who drops his bat in the on deck and starts that way. If the altercation was in fact a fight then the parties involved are dumped along with anyone who joins in.