Is anyone else confused about Railgun S at the moment? Misaka doesn't seem to know about the Sisters project, which she does know about in the season before, yet she knows saten + uiharu, whom she gets to know during the season before... or perhaps I am having trouble thinking clearly atm.
Scratch that, I think I was confusing the first part with one of the Index seasons. Now that I think about it, she doesn't know the sisters in the first railgun.