Sounds to me like Paul Hills didn't even have a basic understanding of how a wastegate works. In fact judging by his mapping it looked like he didn't have a basic understaning of how a 4 stroke engine works.
Seems he was a big pretender and the lie finally caught up with him.
What i can't understand is he might have been truelly shocking at the beginning but you would imagine that in all the time he was running he would have had the chance to do some learning/homework and pick up the right skills. He even had a dyno to help him develop but he seemed as bad, if not worse at the end.
I guess the lesson is even if you are going to a tuner get yourself some basic knowledge so you can spot the cowboys.