Oh that, for questions,
Answer to 1: Review the story, did it really seem like they were having a communication, or was Tony one-sidedly talking and vice-versa. The latter is the right one, there are details that point the grandfather doesn't seem to notice Tony's existence, if you look at the overall dialogue between the two you realize they never directly addressed the other person as if even when they were face-to-face.
Answer to 2: that was the biggest hint to mention how the first narrator was already dead, it was still first person, I just added it as a hint, though in hindsight I guess it wasn't necessary...
Ah, the fact that Juan and Tony were not really interacting was so subtle that it was not clear to me. Thanks for the explanation.