So sick of fanboys wanking about the "rule" of 2. It's a guideline at best from a questionably canon novel, and based on an offhand comment by Yoda. Yeah, there are normally two in a Sith cell. Plageius was around in the Phantom Menace per his book... so I guess Darth Maul wasnt a sith? Oh, and Sid was training Dooku during that time as well.
Quit trying to make Rule of Two happen! It isn't fetch.
Moreover, this is just a bar game in the Star Wars universe, the equivalent of a game where Lizzie Borden fights Al Capone. It's not supposed to be "historically accurate" even in universe.