Link to a video?
Also, how do you know the ref blew the whistle (not trying to be smart, but since I didnt see the play, just asking). Is it audible in video somewhere?
If it happened exactly as you described, the offended team (in this case GA Southern) would have the option to take the result of the play, or replay the down Since GA wound up with the ball, they would replay the down.
BKDOW is correct. Since the IW in the scenario above happened while there was a loose ball, the only available option is to replay the down.