Contradiction with Numbers 23:19
God's promises do not change, whereas Numbers 7:11 implies a command for offering that can be altered.
Numbers 23:19: God [is] not a man, that he should lie; neither the son of man, that he should repent: hath he said, and shall he not do [it]? or hath he spoken, and shall he not make it good?
Contradiction with Hebrews 13:8
Jesus Christ is the same always, whereas Numbers 7:11 assigns offerings to specific days, which can suggest variability.
Hebrews 13:8: Jesus Christ the same yesterday, and to day, and for ever.
Contradiction with James 1:17
Every perfect gift is from above and unchangeable, in contrast to Numbers 7:11 where offerings are organized by human assignment.
James 1:17: Every good gift and every perfect gift is from above, and cometh down from the Father of lights, with whom is no variableness, neither shadow of turning.