Why wouldn't it work if there are two packs? It would be kind of silly to have such a role and then have the number of packs break it's function.
I'd expect the pack that ate syber sid to lose it's next hunt, regardless of how much time there is between hunts.
You are right about the other thing though - tomorrow night should give us some solid evidence about the number of packs in the game.
I asked the GM about that before the game started.
http://forum.paradoxplaza.com/forum/showpost.php?p=10728031&postcount=49
Didn't get an answer though. We'll soon find out.