Great story so far. I especially like that you have a reasonable and logical explanation for how and why this happened. I do wonder about the timing though. If Harry's original timeline is so many years ahead of this one, then how did that fragment of his soul attack itself to this Harry when he hadn't even been conceived yet, let alone born? Are souls somehow already in existence long before even conception? Are they just waiting for their bodies so they can move in? Or is the rate at which time progresses in the two dimensions relative to each other somehow variable like Narnia? That would actually work. Dimensional travel runs on 'Narnia Time'.
I like that you didn't just come up with some lame reason for the cross-dimensional travel. You actually thought of a valid and logical reason. Many authors don't do that. Some don't even explain, allowing the characters in the story to be clueless as well, and that's just a lame cop out.
And as for this site showing an update every time you make an edit, that's because you have changed something and it is sending out the update e-mail to tell you readers. Technically... you have changed something and the site informs your readers in case it was a major change that affects the overall story. Annoying, I know. But it does make a certain amount of logical sense.
Author's response
I'm glad that you like it and have enjoyed my take on what might have caused a person to dimension travel. As for the time difference that will be addressed, but I will tell you that its more of a Narnia time thing.
As for the sites updates, I do get the idea behind it, but it's just frustrating, as I upload chapters as a document and then have to go back and check the formatting and sometimes it takes me two or three views of a chapter to catch and edit out the messed up formatting. Then again, I'm sure that I still miss somethings, as it seems to like to combine words that shouldn't be combined.
Ah, well, I suppose that I just wish that the update system was more like fanfiction(dot)net's, in that it doesn't send out an update notification for adding a space between a few words.