I don't have my rule book with me at the moment, but from what I remember:
When zombies break in do they feed more than once?
No, they only feed on one unlucky soul.
I mean, you don´t need to be there to have the rights to receive the card, right?
You do not have to be in the parking lot to receive a card.
Another thing i just remembered: in a 5 player game, do the game ends when there is only 4 characters remaining or with 5 characters?
Will have to look this one up, but my gut feeling is that the game will end if all the characters are in one place (not in the parking lot) or there are only 4 characters remaining.