Contradiction with 1 Kings 4:7
1 Kings 4:7 states that there were twelve officers over all Israel, while 1 Chronicles 27:12 implies different leadership possibly due to the mention of tribal leaders for military divisions, presenting an inconsistency in the organizational structure of the rulers.
1 Kings 4:7: And Solomon had twelve officers over all Israel, which provided victuals for the king and his household: each man his month in a year made provision.
Contradiction with Numbers 2:18
Numbers 2:18 discusses tribal arrangements different from the military divisions in 1 Chronicles 27:12, showing a contradiction in how groups were organized.
Numbers 2:18: On the west side [shall be] the standard of the camp of Ephraim according to their armies: and the captain of the sons of Ephraim [shall be] Elishama the son of Ammihud.