If Namine was able to alter Sora's original memories and replace Kairi with herself... and do that while Sora was awake... then why did he have to go to sleep for her to simply swap herself with Kairi again? And why did it take so long... she was able to completely mess up his memory in the small amount of time that it took him to make his way through the castle so I don't see why changing it a second time tooked so long. Additionally, she said that she never "erased" his memories to begin with and simply "rearranged the chains"... so bringing them back should be even easier then before when she had to create new memories from scratch.
Also... why did Sora have to give up the memories from the castle in order to regain his old memories? I can understand giving up the memories that Namine tampered with, but all the other stuff... him meeting the Organization... fighting the Riku Replica... and meeting Namine... those were new memories. It doesn't make sense that he would have had to have forgotten all of that as well.
If Namine was able to alter Sora's original memories and replace Kairi with herself... and do that while Sora was awake... then why did he have to go to sleep for her to simply swap herself with Kairi again? And why did it take so long... she was able to completely mess up his memory in the small amount of time that it took him to make his way through the castle so I don't see why changing it a second time tooked so long. Additionally, she said that she never "erased" his memories to begin with and simply "rearranged the chains"... so bringing them back should be even easier then before when she had to create new memories from scratch.
Also... why did Sora have to give up the memories from the castle in order to regain his old memories? I can understand giving up the memories that Namine tampered with, but all the other stuff... him meeting the Organization... fighting the Riku Replica... and meeting Namine... those were new memories. It doesn't make sense that he would have had to have forgotten all of that as well.