Li Shenron said:It just makes no sense for something to be Holy and Unholy at the same time, whatever the rules say.
That sounds like the same arguement people use to say that a weapon can not both have a fire enchantment and a cold enchantment on it.
I dont see a problem either way. Magic is odd. I have no problem with a nonintelligent object having each and every alignment out there. As far as I know only creatures have full alignments, objects can be 'aligned' in every which way though, it is just what they have on them.