Thanks for looking into it, guys. I know this is pretty minute, obscure detail, but for us statistical nerds, this is important!
Also, to respond to this:
After all, a batter isn't awarded an SF if the OF drops the ball.
This is not entirely true. If a batter hits a fly ball to the outfield that the official scorer believes would have been deep enough to score the runner from third base, he is still credited with a sacrifice fly even if the outfielder drops the ball. I've seen it happen more than once.