Ghost wasn't really the obvious kill it made much more sense to kill Bijou. Ghost's power is pretty useless at this point, all it means that the mafia didnt kill him is that the mafia dont care if they get rolecopped. Bijou is much smarter kill for them since he is never going to get voted off while ghost can by town just following your logic. So him not dying doesn't tell us much he could be either still.
Donkey Kong has seven throws but only one is good.