The amazing thing is that you got more fans to watch the repeat than appeared at the game live!
It most likely means that they don't have a very good method to calculate the seed for the random number generator used in the engine and instead probably use something derived from the combined lineups or something similar. I imagine that had there been a GS update or maybe even an experience pop between the two games, maybe things would have been different.
But if they have some algorithm that creates the RNG's seed based on some combination of the match input, and the match input is essentially identical, they'll come up with the same seed and then every time a random number is needed, it would follow the same script.