When the ref reviews a replay, he is only allowed to look if the shot got off in time? Correct?
Not allowed to check to see if the shot clock started again in time. Even, if it clearly didn't, if it was late, they are not allowed do anything.
Do I have that right?
You are absolutely correct in this situation. The only thing the refs were looking at was whether the ball was released before the red light. And it clearly was.
They likely would have been able to review whether the clock started appropriately but in this case, they had little basis to go on. In other words, if there was a tenth count, you might be able to see that on the clock. Or, if there had been multiple seconds left, you could also gauge whether time is running off the clock.
But wit one second (and no tenth count), they would have had to pull out a stop watch to see whether there was a delay. And they weren't going there first of all. And it probably is not within the rules anyway.