Has anyone else noticed?

No, He never said he didn't know who Xemnas was actually,

Im pretty sure he didn't know who Xehanort, who looks exactly like Xemnas, was.

or not.

 

we all saw mickey in the seacert tralier, he had to forget or something, or he would have know xehanor.t

 

We don't know that Mickey know MX, because if he's know that his name is "Xehanort", he should be remember that when he said, "The Organization XIII leader is Xehanort's Nobody"

So i believe that his memories is erased about keyblade war, except Xigbar himself.

 

Maybe he did know Xehanort. And maybe his memory wasn't erased, because again he said "The Org. Leader Is Xehanort's Nobody"

Now think about it Xehanort's Nobody, could also be Master Xehanort's Nobody.

 

he did, sorta. at the HB 1000 heartless battle, he didn't know, until something clicked. quote: "now, I remember. Xehanort" and so on

 

yes key word being "remember", you can't remember if you lost your memories.

 

He never really lost his memory, they kinda were taken away from him due to the power of namine, so thats not really losing them, she just reconstructed them so to say.

and yea thats exactly what i was getting at, he didn't lose his memory, it just slipped his mind

 

I hope not. That's be too sad. >_______< But then, like Square Enix would care if we sobbed about another tear-jerker of an ending.

 

thats true.