Heh, glad to see this one again. I do rather likely Harry's "percussive chastisement" of Dumbles and I can't blame him. It looks like life's quite 'sporting", in very different ways, for Harry in both universes. I'm looking forward to more.
In the meanwhile, nitpicks:
"...friend of Harry Potters." should either be "...friend of Harry Potter." or "...friend of Harry Potter's." I prefer the first alternate.
"...that their was..." should be "...that there was..."
"Harold Jamison Evan Potter", shouldn't that be "Harold Jamison Evans Potter"?
There may be more, but those are what caught my eye on first reading.