Hmm, so the "original" Ginny and the one brought back through time are merging? That could cause some interesting problems with control for a while. Meanwhile, I rather like it that Harry is showing concern as this gives bothof them the chance to become real people to each other. I'll be looking forward to see what other twists you ring in; I can most certainly see Ginny being advanced a year and joining with Harry, Hermione, and Ron. Depending on how one feels about Ron, this might could lead to a revised "Golden Trio" of Harry, Hermione, and Ginny, if not this year then in Fourth Year if Ron turns away after harry gets "chosen" and Ginny doesn't. As I said, lots of possibilities.
Author's response
Indeed OGinny and AUGinny are merging. I hate it that some authors, no matter the character they sent to "the past", have this idea of merging, where you just get a super powerful and in control of their power adult with a kid's body. It's almost as if the "older" personality takes over and the kid is forgotten. Harry, due to the way the Dursleys drilled into his head that everything is his fault, will obviously feel guilty, so at least at first his interactions with Ginny will roll around that. About Ron...well you might be surprised and that's really all I can say about him without spoiling the story for you ^_^