Contradiction with 1 Chronicles 6:33
This verse lists the sons of Levi differently than 1 Chronicles 6:21.
1 Chronicles 6:33: And these [are] they that waited with their children. Of the sons of the Kohathites: Heman a singer, the son of Joel, the son of Shemuel, [waited: Heb. stood]
Contradiction with 1 Chronicles 6:47
This verse lists a genealogy in a different order than 1 Chronicles 6:21.
1 Chronicles 6:47: The son of Mahli, the son of Mushi, the son of Merari, the son of Levi.
Contradiction with 1 Chronicles 6:62
This verse provides a different allotment of towns than 1 Chronicles 6:21.
1 Chronicles 6:62: And to the sons of Gershom throughout their families out of the tribe of Issachar, and out of the tribe of Asher, and out of the tribe of Naphtali, and out of the tribe of Manasseh in Bashan, thirteen cities.