Contradiction with Exodus 18:21
Numbers 11:28 shows preference for a singular leader like Moses, whereas Exodus 18:21 advocates for appointing multiple capable leaders.
Exodus 18:21: Moreover thou shalt provide out of all the people able men, such as fear God, men of truth, hating covetousness; and place [such] over them, [to be] rulers of thousands, [and] rulers of hundreds, rulers of fifties, and rulers of tens:
Contradiction with Numbers 16:3
In Numbers 11:28, Joshua supports Moses' singular leadership, while Numbers 16:3 depicts Korah challenging this by suggesting that all of Israel is holy, not just Moses.
Numbers 16:3: And they gathered themselves together against Moses and against Aaron, and said unto them, [Ye take] too much upon you, seeing all the congregation [are] holy, every one of them, and the LORD [is] among them: wherefore then lift ye up yourselves above the congregation of the LORD? [Ye take...: Heb. It is much for you]
Contradiction with 1 Samuel 8:5
Numbers 11:28 highlights Joshua's reluctance to share leadership, whereas 1 Samuel 8:5 sees the people of Israel asking for a king, which implies a shift away from prophetic leadership like Moses.
1 Samuel 8:5: And said unto him, Behold, thou art old, and thy sons walk not in thy ways: now make us a king to judge us like all the nations.
Contradiction with Matthew 20:25-26
Numbers 11:28 reflects a hierarchical leadership under Moses, whereas Matthew 20:25-26 emphasizes servant leadership and rejects hierarchical authority among followers of Christ.
Matthew 20:25-26: But Jesus called them [unto him], and said, Ye know that the princes of the Gentiles exercise dominion over them, and they that are great exercise authority upon them.