Tô sem servidor aqui para testar...

mas tenta:

function onLogout(cid, position)
F = {x = getCreaturePosition(cid).x+1, y = getCreaturePosition(cid).y-2, z = getCreaturePosition(cid).z} -- frente /\
D = {x = getCreaturePosition(cid).x+2, y = getCreaturePosition(cid).y+1, z = getCreaturePosition(cid).z} -- direita
E = {x = getCreaturePosition(cid).x+1, y = getCreaturePosition(cid).y+2, z = getCreaturePosition(cid).z} -- direita
T = {x = getCreaturePosition(cid).x-2, y = getCreaturePosition(cid).y-1, z = getCreaturePosition(cid).z} -- tras

doRemoveCreature(getThingfromPos(F).uid)
doRemoveCreature(getThingfromPos(D).uid)
doRemoveCreature(getThingfromPos(E).uid)
doRemoveCreature(getThingfromPos(T).uid)
end