Summonning Armorstands works not as expected

When you summon an armorstand /summon ArmorStand 0 56 0, it actually summons hom at x=0,500 y=56 z=0,500. To fix it, do /summon ArmorStand 0,0 56 0,0 and it will be at x=0 y=56 z=0. That is anyoing.