That leader pissed me off as soon as he said that Asuna can't leave on her own accord. Fucking control freak. (/sets off Buff's autonomy-protection-trigger)

Unfortunately I see Kirito losing this dual as well, then given the position (or perhaps he requests it) as Asuna's bodyguard. I was surprised to see them hold off the Assassination guy's role till later.

As for dual-wielding, my assumption would have to be that it has something to do with:

1) The way Kirito uses his sword in SAO, which is interrelated with
2) Kirito's background in Kendo. He didn't mention it in his talk with the imouto, but perhaps he was training under Nitouryu back then.