[just another ref]

Originally Posted by mcdanrd

In this case, where two free throws are to be administered, the ball becomes dead when it is apparent the free throw will not be successful, regardless of what the officials told the players before the first throw, the ball should have been dead after the first throw per rule 6-7-2a. The error is therefore correctable per rule 2-10-1e (erroneously counting or canceling a score) and 2-10-3 (If in article 1e the error is made while the clock is running and the ball dead, it must be recognized by an official before the second live ball, which apparently it was)

Actually, if the officials announced 1 & 1, I believe the error would be failure to award a merited free throw.