Just chiming in to say I'm pretty sure Northwestern takes 3 directors a year, so even if they did make 2 offers and both accept there is a spot left assuming they're recruiting their usual number.
Not a director (designer, we don't have our own topic!) but I applied to Northwestern and when I interviewed they said it would be hopefully by the middle of March. Not sure if that's true on the directing side as well, but an idea at least. :)