I know exactly how you feel. I am giving serious consideration to tweaking A Little More Time again (as I did with the Weasley descendant reveal) because it was kind of my goodbye to playing in Potterverse - I fixed what I felt was a great wrong of the series but once I'd done it (and the couple of little sequels) and I knew it was sound and canon safe, I felt I didn't want to play any more. They were happy and settled and I could leave them all be, content in my mind all was well. And yes, I know it's fictional and that's silly, but that's how I felt. ;p But knowing there are details in it that could be used to contradict that happy ending, however tiny, does bug me. It also occurred to me today that as a none-Pottermore person (as far as I can gather, the site takes much time and computer speed and I lack both!) there's probably a load of other stuff on there that also contradicts me but I haven't time to look into it! I think I may just settle for a bit more tweaking based on this bio and pray I never find out anything from there that blows ALMT out of the water forever!

I can understand JKR has a world and she wants to share what she couldn't share in the books. But it does to a certain extent ruin the fun of speculating...