Forum:Quick comment about 398 and Aizen

So what I'm wondering. (I'm looking at page 398 at onemanga.com) Is it Aizen that states "...and they're related?" Because if that is true, then it puts a few holes/concerns in this Aizen knows all theory that I and a lot of other people have. Maybe it is just poor translation, that's what I'm chalking it up to, but if it isn't, how would Aizen know so many things about Ichigo from the moment he's born and yet not know that Isshin is his father?