We first see Twilight Town in COM, right? The memory was from Roxas since it was said that the memory came from the other side of Sora's heart. The thing is, this was during COM, so how could Roxas be in Twilight Town or even know about it? He was in the Organization still. He wasn't in Twilight Town (The copy, anyway) until after his encounter with Riku, which was after COM. So how could that memory be in him if he wasn't in Twilight Town?
I put it in this section due to some spoilers.
I put it in this section due to some spoilers.