"Joseph is a fruitful vine, a fruitful vine near a spring, whose branches climb over a wall. With bitterness archers attacked him; they shot at him with hostility. But his bow remained steady, his strong arms stayed supple, because the Mighty One of Jacob because of the Shepard, the rock of Israel, because of your father's God who helps you, because of the Almighty who blesses you with blessings of the heavens above, blessings of the deep that lies below, blessings of the breast and womb. Your father's blessings are greater than the blessings of the ancient mountains, than the bounty of the age old hills. Let all these rest on the head of Joseph, on the brow of the prince amongst his brothers.
I can not find your reasons given in the bible. Yet I can quote from the bible to support mine. So you are the one in delusion. The son's of Joseph were each given an allotment different in kind in the promised land.