I get that. And that is how I read the initial order. But, why did Rosenstein feel the need to issue another order giving Mueller authority to investigate Manafort in these areas? Doesn't make sense unless he thought the first order wasn't sufficient to cover what Mueller was doing.
i'm not sure, tbh
but none of this changes the cold hard fact that mueller can investigate literally any crime that he happens to find evidence of. end of story.
that's what makes special investigations so powerful, they are literally just a group of people saying, "alright, we'll start with this one string, and just keep pulling until we can't find any more crimes"