Contradiction with 1 Chronicles 15:15
This verse states that the Levites carried the ark of God on their shoulders, contradicting Numbers 10:21 where the Kohathites carried the sanctuary using the prescribed method.
1 Chronicles 15:15: And the children of the Levites bare the ark of God upon their shoulders with the staves thereon, as Moses commanded according to the word of the LORD.
Contradiction with Numbers 4:15
This verse mentions that the Kohathites could not touch the holy things or they would die, while Numbers 10:21 suggests they carried the items, implying they could touch them.
Numbers 4:15: And when Aaron and his sons have made an end of covering the sanctuary, and all the vessels of the sanctuary, as the camp is to set forward; after that, the sons of Kohath shall come to bear [it]: but they shall not touch [any] holy thing, lest they die. These [things are] the burden of the sons of Kohath in the tabernacle of the congregation.
Contradiction with Exodus 25:14
This verse mentions using poles to carry the ark, contradicting the notion in Numbers 10:21 of the Kohathites carrying the sanctuary without mentioning poles.
Exodus 25:14: And thou shalt put the staves into the rings by the sides of the ark, that the ark may be borne with them.