I only have 1 thing about this thread. And, it relates to this thread.
How should I have handled this
All I can say is this. Don't complain about the umpire's you get in a game if you are going to contribute to their ignorance. That is all I will say about this.
You are being a coach and I understand that. I don't think I would have done that since I do know the rules. But, you chose to so be it. Just remember, you are contributing to your own headaches when you continue to have incompetent umpires. Just don't be 2 faced about the issue.