I get the impression that questions were made up on the spot to guide the focus of the quiz and to keep it tight. This is completely irresponsible and implements a clear bias in the quiz. For integrity the questions really ALL ought to be decided ahead of time and not spend more than two questions on a single topic as this biases anyone with a good knowledge in that topic. It doesn't matter if one person is getting all the questions, odds should be stacked equally. You should be rewarding knowledge, not luck on the final question.

