The clock doesn't stop until it hits something out of bounds, but the refs do not have the power to change their previous call of when it went out of bounds by looking at a replay. The whistle obviously blew before the guy on the sideline caught it, even though the ball was not out of bounds. So it was the right thing to do to put up 2.0 seconds, but it was the wrong call.
So if the ball is inbounded and the whistle blows, but it turns out there really wasn't a reason to blow it... and the A&M players all stop... then you run the clock down because the whistle wasn't on purpose?
Bottom line is, the whistle blew and the players stopped. You can't try and figure out what would have been because the players didn't think the ball was live anymore.
