In JoJo's Bizarre Adventure Part I Phantom Blood, in the climax ending, Jonathan sacrifices his life to defeat Dio and save Erina, his unborn child Jorge and baby Lisa Lisa.
Erina manages to save herself and Lisa Lisa by hiding in Dio's coffin, but then in Stardust Crusaders, another coffin with "DIO" engraved on it is rescued from the bottom of the ocean where Dio had been sleeping for the past century, having survived by stealing Jonathan's body.
Where did that second coffin come from? I've came back to this to try and make sense of it but I don't know if it's a plot hole or not.
I enjoy JoJo's Bizarre Adventure so much, and there are instances where it really stretches it too far.
Like some bizarre happenings have some kind of explanation in it (see King Crimson) but this one is the one that still evades me.
Is there an explanation for this?