I created a new world in the latest snapshot (14w07a) and started mining, i noticed i didn't have the proportional amount of ores compared to the amount of blocks i mined, thing is, the ores clipped through walls and then teleported to the surface

I went into a cave with my wooden pickaxe and started to mine cobblestone (like all do), i had mined aproximatley 20 blocks but i had 13 in my inventory, when i got out of the cave the seven missing cobblestone blocks were out there.