In the version of 'Blood Ties' where the keeper wins by moving Zombies to the Furnace Room altar it appears to be impossible to stop him winning.
There is absolutely no way to open the doors to that room, and monsters can pass freely through them. All the keeper need do is spawn a zombie in the crypt and move it into the furnace room, for 10 threat total, and 6 turns later he's won the game. The players can't possible win in 9 turns (in a 4 player game) and always certainly won't be able to stop the zombie getting there (for a start they won't know they need to)
What am I missing here?
Any chance of some official advice?