Answer:
a) Both cards are destroyed, because they are both named "Harpie Lady".
"Harpie Lady 1's" name is always treated as "Harpie Lady", both during the Duel and when constructing your Deck. (This is also true of "A Legendary Ocean" and "Umi".)
b) "Harpie Lady 1" would not a valid choice. They would need to choose a different card, like "Harpie Lady" or something else. (Not that this happens often)
Curtis Schultz
UDE Netrep
CurtisSchultz_Netrep@hotmail.com
"Removing your finger. That's a good power, Uncle Glen. I must have it..."