Review Detail of Dacraun in The Intelligent Potter

I really like the potter universe, and the premise of this story caught my eye. I didn't make it past chapter 6 though. What's the point in making a whole different time-line when he somehow has impossible leaps of knowledge that he couldn't possibly have since you changed the things he learned and knows of? Seriously I spend half my time interested and the other half frowning while I read.