I actually quite enjoy this story alot and I can tell you that had this happened or that happened, canon might have fallen in this path, however it was a story initially geared for children and that is why it wasn't quite so great. I think that, in part, is why we have so many stories in the fan fiction world now. Your story is exciting and it's not quite the train-wreck as some of the other, bad things consistently happen to Harry stories. Here's the problem I see that you have. You, like me, have far too many oars in the water. This is a story that I would urge you to place a priority in and start cranking it out as I enjoy it more than the others. That being said, I would hope that you do a little more with the two "youngest" Weasleys. There is always room for an attack on St. Mungo's Hospital, and perhaps, either, a branding of the two, or some more wickedness coming from them. I know that I've got some in store for my two in Hell, but that's my story, not yours. Please update soon.
Geovanni Luciano