[Jim S]

The first is ideed a spot foul. But does the spot mean anything in this case? No, because it is on the 'defense'.
You either have a loose ball foul during the kick or a defensive foul during a running play that will be added on to the end of the run.
Don't need to worry about the exact spot here

The second answer is in two parts. First, you tell the umpire to shove the whistle....... lose the whistle. The rest of the answer is that we would probably have to see the play. The umpire was most likely right, even if his mechanics weren't.