Contradiction with Numbers 18:7
Numbers 18:7 specifies that only the descendants of Aaron should perform the priestly duties, suggesting exclusivity that contrasts with the shared duties mentioned in 2 Chronicles 30:16.
Numbers 18:7: Therefore thou and thy sons with thee shall keep your priest's office for every thing of the altar, and within the vail; and ye shall serve: I have given your priest's office [unto you] as a service of gift: and the stranger that cometh nigh shall be put to death.
Contradiction with Hebrews 7:27
Hebrews 7:27 describes the singular sacrifice of Jesus, differing from the repeated sacrifices by priests depicted in 2 Chronicles 30:16.
Hebrews 7:27: Who needeth not daily, as those high priests, to offer up sacrifice, first for his own sins, and then for the people's: for this he did once, when he offered up himself.