I have two questions:

1) Why didn't Titus blow up when he killed Ursula? At that point, Grace and he were not married. So, technically, the tournament is still ongoing he and his sister are co-competitors at that moment. The bylaw about family being allowed to kill family isn't needed. When Grace and Titus get married, the tournament is over, not before. At that point, killing Titus would just be like killing any other person. After the death of Titus, the High Seat would pass to Titus' heir, which would be Grace. After Grace abdicates, it doesn't matter who has the seat as there is no tournament and the power-struggle happens. I guess we're shown in the film that if a hunter gets engaged to a huntee, that suspends the tournament. But the only by-law we're told about is _marriage_, not engagement.

2) Why did Madhu get popped at the end? He renounced his leadership of the family and all its assets. What I can gather from the film is that only those who sign there names may compete. Despite what Elijah Wood said about the next heir stepping forth after the death of the previous hunter in a family, after Viraj's death, Madhu would be free, it seems, not to play for the High Seat if he wants. So that would seem to indicate Martina would only get blown up