Sort of. Basically, IIRC, the idea is that Revan's centuries long torture at the hand of the Emperor kinda broke him, splitting him into a light side version that became one with the force and a force ghost, while his dark side got to keep the body and attempted to 'solve' the problem of the Sith Empire by way of genocide with a... I can't remember if it was a nanovirus or a droid army. Something like that. Why yes, Revan has enough dark and light side for two people because he's Grey Jedi Jesus.
I...I didn't think the force worked that way.
Video games, I guess.