[kiwiref]

As my refereeing experience is based on FIBA rules, some may disagree with me, but...
All the rules reffered to in this case are identical to FIBA rules, including those on live ball, dead ball, and correctable errors.
Looking at the facts, we can easily agree that there should be 2 free throws. For whatever reason, player took a rebound after the first shot, and one must admit that at that point the officials have FUBAR-ed the game (the term is purely technical in this part of the world, it stands for ****ed Up Beyond Any Recognition; the origins go back to the yet unpublished book titled "Bush legacy to the world").
Sorry for that digression. Anyway, the fact remains that the ball was DEAD after the free throw was missed. Any play following this free throw is null and void, just as it would be if the same referees were actually aware of the game situation, and did not run down the court and called the shot good.