MrInsaneA said:

That still really doesn't make sense. Why are two sabers better then one?

Because your going up against a dude wielding 4 lightsabers... I don't see how you can't think two might be more helpful when your effectively being attacked four times at once.

Besides this, given the number of times that the Jedi (and Sith) manage to loose their lightsabers during the films (Obi-Wan in TPM, Anakin in AotC, then Obi-Wan, Yoda, Sidious and Anakin in RotS, not to mention Luke in ESB) having a back up weapon actually makes a lot of sense rather than just having one weapon...

Despite all that, it was merely a suggestion for how Anakin could change sabers and Obi-Wan end up with Anakin's saber... It's somewhat limited given the footage available, but if you have a better suggestion feel free to make it.