My thoughts:
1. Good on being proactive at R2, and good outcome. But ultimatums have a way of going sour on us some times.
2. If the team has a TO, then yes, UD is a TO. If no TO's remain, it's LOR/Point.
3. Yep. First whistle wins
4. What Felix said
My understanding, H6's term of service was ended by the LOR/point. So H10 would rotate into the serve the next time H serves.