well iv been wondering in the game " sora's heartless" was the main problem of the bugs but the heartless was it the real sora's heartless from KH1 or data Sora. And if it was the real Sora's how did it get there???

i belive that sora became a heartless n then found kairi which she turned him back so i dont think it could be his

It was data. Everything in that journal, with the exception of Mickey, Donald, Goofy, Maleficent, and Pete, was data.

When Sora became a Heartless in KH1, Jiminy recorded that in the journal and when they digitalized it, Sora's Heartless appeared, who was data like the rest.

thanks now i get it,ill give you first three a reputation.