Some plot holes?

I think founded some plot holes in KH:
-If Terra-Xehanorth unlock the original 6's members hearts, transforming them in nobodies, then why they are loyal to Xemnas, and they call him The Superior, showing how much respect they have for him? Shouldn't they be suspicious of him?
-If "Ansem" SoD opens relatively easily the door to kingdom heart, then why Xehanort needs the X-blade? And if in BBS the X-blade was created from the light and darkness of Ventus and Vanitas, then why now to create the X-blade a new keyblade war is needed? I just don't understand
-If Isa was aware of the true plan of Xemnas, then why when he is disappearing in KH2 he complains against kingdom hearts for his heart?
-If Terra (I mean Lingering Will) hasn't a heart, but only a mind, then why he can wield the keyblade?
-Why after the explosion of the machine for encoding kingdom hearts, Riku return normal and Ansem is sent to the realm of darkness?
-How was Xehanort's Heartless able to mantain is own mind?
-How is possible that Roxas and Naminè co-exist with their somebodies? They are also special nobodies, the first is able to wield the keyblade and the second can modify the memory of Sora and of the people linked to his heart. Plus they are the only nobodies who can fell real emotions since they was born.
-Why Roxas loses his memory after being captured by Riku?
-Why in KH2 Sora, Donald and Goofy know Axel? They meet him in CoM, but then they lose their memory.
-How in CoM Sora, Donald and Goofy arrive at Castle Oblivion?
-Why Xemnas can't use the keyblade? If Roxas who is Sora's nobody can use the keyblade, then Xemnas who is the nobody of a keyblade wielder should be able to use the keyblade too, shouldn't he?
-Why Terra-Xehanort in KH2 has Xemnas voice and red eyes, while in KH BBS he has yellow eyes at first and red eyes after losing memory and Ansem SoD voice?
-Why Xemnas when he goes to take Roxas into the organization has YELLOW eyes?
-How can the organization know about Naminè's powers?
-How can Xemnas know that Sora has become an heartless and that Roxas would have born inside Twilight Town?
-If Sora becomes an heartless when he unlocks his hearts, then why when Ansem uses the keyblade of hearts on Maleficent she only transforms into a dragon?



These are some questions I can't ask to in KH.

 

Terra-Xehanort took the hearts of the original six Nobodies, but they were all involved in this plan. It was them who banished Ansem to the Realm of Darkness
The Kingdom Hearts in KH and BBS are both different ones. Xehanort theorizes that the Keyblade War will allow him to find the true Kingdom Hearts
It's never stated that Isa is aware of Xemnas' true plan. We don't know when Saix received Xehanort's heart.
The whole situation with Terra's Lingering Will is very strange. I'd assume that because Terra's heart still exists, but his body is dominated by another heart, his keyblade stays behind, much like Eraqus' keyblade stays behind after his death
Hearts are unpredictable. Ansem specifically says he has no idea what will happen when he uses his machine
Xehanort's Heartless has a strong will, and as such is able to retain a human form and will, much like special Nobodies
Roxas doesn't actually coexist with Sora. He joins back with Sora at the start of KH2. When Roxas and Sora meet, it's more symbolic or internal. As for why Sora and Roxas coexisted BEFORE Chain of Memories. That has to do with how Kairi restored Sora's physical form, and the fact that Ventus' heart was within Sora
Roxas' memories are overwritten by DiZ to throw off the pursuers from the Organization.
They don't know Axel... hen they meet him he says "The name's Axel... got it memorized?"

 

But how DiZ rewrote Roxas memories? That's what I don't understand
In KH2, Saix said that Axel betrayed them and want to transform Sora into an heartless, then they think that the man who kidnapped Kairi is Axel. Nothing strange here. But when they meet him in Hollow Bastion, Sora immediately says "You are the one who kidnapped Kairi" before Axel introduces himself.

 

Roxas is Sora. Namine can change Sora's memory, so.
About the other thing, I'd need to watch the scenes, but doesn't the Twilight Gang describe how it happened to Sora? They could've said how he looked like.

 

DiZ put Roxas in a digital world where he could rewrite Roxas' memories
Axel was described to Sora by Hayner Pence and Ollette

 

OK, I never tought like that before, because Pence says that a man kidnapped Kairi, but he doesn't describe him, then there it the scene in which we see Axel kidnapping her, but it should be like that.

 

Well not only that, but I looked it up, and saix explains who Axel is as well
Sora doesn't immediately say he's the one who kidnaps Kairi, either, it takes him a while to realize it

 

Yes but they don't want to be nobodies, for example Xaldin and Saix say that after collecting hearts "We can truly, finally exist". So they should be against Xemnas who make them lose their hearts.

 

They didn't know they would become Nobodies. They were the first Nobodies to ever exist

 

I remember hearing somewhere that Sora and co. arrived at castle oblivion because the bit of land they were already on after the World of Chaos battle was already the Land of departure/Castle Oblivion, they just had to walk for a while to get to the Castle. I don't know how official this is or not :) But I think that there are maybe a few things in Kingdom Hearts, plotwise, that you have to take with a pinch of salt and not think about too much haha :) Especially don't let these kinda questions get in the way of enjoying the story!

 

Of course they found Castle Oblivion in the Land of Departure
Where else would it be

 

No as in the bare little bit of land they were on during the ending of KH1 was Castle Oblivion already. DanceWaterDance asked how they got to castle oblivion after KH1 when the divisions between worlds had been re established, I remember hearing (and I think is correct) that they were already on it

 

Sora doesn't leave that area at the end of KH1, he's still there in CoM.

 

I think we're basically saying the same thing here, it's the same land he was on, he never left, he didn't need a gummi ship or anything he just stayed there :)

 

KH is a giant hole of no-plot .

 

But the door that Ansem opened was under Hollow Bastion, so how they were in the land of departure after defeating Ansem?

 

...what... are you talking about?

 

The door to the darkness that Ansem opened to reach kingdom hearts was under hollow bastion. Ansem the wise wrote this in the secret reports in KH2

 

The door Ansem used to reach Kingdom Hearts was in the End of the World.

 

A while ago I saw a days cutscene in which Xemnas, Xigbar and Saix talk about their plan and that Xion would be a worthy vessel. So Isa/Saix is aware of the true plan of the Organization