And all of that, even if correct, only applies to runs that haven't been completed. The 2 runs had already been completed. When it talks of completed runs, it doesn't refer to the time the ball is thrown.The law refers to a 'wilful' act by a fielder with no mention of a batsman. It refers to a throw or act. In this case there was no wilful act by the fielder, ie he didn't throw it directly at the boundary, merely a throw at the wicket and at the time of the throw they hadn't crossed so only one run plus the boundary should have been awarded.
Except the experts who made the decision.You can try and twist it as much as you like but it seems all the experts are pretty much in agreement