In a interview,the actor of Brett Pattridge say's that he play his role as if he was RJ so my guess is that BP was the first RJ by Bruno Heller but so many people have done videos on youtube or blog about him to be RJ so I think he just decide to switch everything because everyone think it was Pattridge after like 3 season so that was just not a clue anymore.just a though i got when i read the interview.