A man who does bad things, does a good thing and brings balance to Force as a whole? It just doesn't make any sense.

That's like if Osama Bin Laden rescued a kitten hit by a car and somebody said he brought balance to terrorism.

Now, don't get me wrong, Lucas is just screwed up enough to have implied it as you see it, but it shouldn't be right.

EDIT: I looked it up and Wookieepedia says something similar to you. Link. And I still maintain that it's dumb.