Critical Characterization Failure - Sephiroth

[MJN SEIFER]

Jenova controlling Sephiroth does make some level of sense, but Square have apperently stated that it is another way around - Sephiroth takes control of Jenova, who appears as Sephiroth, it sounds more confusing than it is, but when you think about it makes a whole lot of sense, as the answer is there in front of you the whole time.

Did Square say that or did Square-Enix say that?

Whoever wrote Ultimania said it. I have never read Ultimania so I don't know how it's worded - I never will read Ultimania because from what I hear everything it "explains" I already got from the game (such as the identity of the clones).