They once again altered the script before Game 4.
Originally Miami was supposed to win, but they felt that the best way to maximize LeBron's legend and hype would be for him to rescue the Heat down 3 games to 1, facing a pivotal Game 5 in San Antonio. It would be more heroic and epic if he did it down 3 games to 1, instead of 2 to 1 and tying the series at 2.
As of right now the script is for LeBron to go bonkers in Game 5, Heat win, then LeBron once again to save the Heat in Game 6, then LeBron to finish the job in Game 7, leading the Heat to 3 straight victories.
The NBA wants this series to be about LeBron and his greatness and what better way to do it down 3 games to 1.