It's only on the Sith side it's supposed to be 2. Yoda and Kenobi weren't together as a pair, Yoda died before Luke even became a Jedi, and Leia isn't a Jedi, so doesn't count (or if she does count, include her in your previous pairings, as she was there). It's not like a video game, it's not supposed to be balanced like that. The Sith had an Empire of troops, and still have the storm troopers, who outnumber the resistance.
I was being facetious. (But Yoda died after Luke returned from Jaba's palace where he announced himself as a Jedi Knight, so yoda died after luke became a jedi knight)