SITUATION:
You have 82 bones on your Bone Wall.
You play Steal on your opponent's Bone Wall.
Your stack of 82 bones are replaced by 1 bone.
You scream ARRRRGGGGHHHH!!!!!!!
I know, in real life, nobody would be stupid enough to do the above, except AIs. But, seriously, by common sense, Bone Walls should stack. If you steal one while having 82, you should have 83; if you play two Bone Walls, you should get 14.
If the replacing instead of stacking is a feature instead of a bug... Zanzarino, YOU ARE WEIRD.
(Don't forget that he said the cancelling-creature-ability "feature" is a penalty for being stupid, and the grindiness brings "longevity" to the game)