why is Roxas Ventus?
Because Ventus eventually becomes a part of Sora, so it makes sense that Sora's nobody would resemble him.

how and when is re:coded supposed to take place?
Just after KHII, the Sora in this game is a digital replica made by King Mickey.

Why is Sora voiced by a girl?
Because he's a pubescent boy who is supposed to sound sweet and relate-able. If he was voiced by a guy he'd sound too stoic.

How does Sora grow over a foot in a year?
Growth spurt dude. Same reason you have 2 elbow creases.



Sorry for answering some of your rhetorical questions XD You are right, it's just a game, I don't think it's necessary to analyse every little piece. I personally think they're making this series much too drawn out and complicated.