Contradiction with Joshua 14:1
This verse contradicts 1 Chronicles 27:20 by describing the land distributions under Eleazar the priest rather than the chiefs of the tribes.
Joshua 14:1: And these [are the countries] which the children of Israel inherited in the land of Canaan, which Eleazar the priest, and Joshua the son of Nun, and the heads of the fathers of the tribes of the children of Israel, distributed for inheritance to them.
Contradiction with 1 Chronicles 5:2
Contradicts by indicating the birthright went to Joseph, yet the leadership (chief rulers) mentioned in 1 Chronicles 27:20 is from Manasseh, a son of Joseph.
1 Chronicles 5:2: For Judah prevailed above his brethren, and of him [came] the chief ruler; but the birthright [was] Joseph's:) [chief...: or, prince]
Contradiction with Judges 11:2
Contradicts as it describes Gilead, within the tribe of Manasseh, primarily from the lineage of Gilead without mention of other chiefs.
Judges 11:2: And Gilead's wife bare him sons; and his wife's sons grew up, and they thrust out Jephthah, and said unto him, Thou shalt not inherit in our father's house; for thou [art] the son of a strange woman.
Contradiction with Genesis 48:14
Contradicts as this verse refers to Jacob blessing Ephraim over Manasseh, challenging the chief status granted in 1 Chronicles 27:20.
Genesis 48:14: And Israel stretched out his right hand, and laid [it] upon Ephraim's head, who [was] the younger, and his left hand upon Manasseh's head, guiding his hands wittingly; for Manasseh [was] the firstborn.
Contradiction with Numbers 26:29-34
Contradicts by listing descendants of Manasseh without reference to specific chiefs mentioned in 1 Chronicles 27:20.
Numbers 26:29-34: Of the sons of Manasseh: of Machir, the family of the Machirites: and Machir begat Gilead: of Gilead [come] the family of the Gileadites.