First Chronicles 6:1-3 says:
There are only two generations recorded between Levi and Moses. According to Genesis 46:11 Kohath was alive when the Israelites moved to Egypt.The sons of Levi: Gershon, Kohath, and Merari. The sons of Kohath: Amram, Izhar, Hebron, and Uzziel. The children of Amram: Aaron, Moses, and Miriam.
Exodus 12:41 shows that they were in Egypt 430 years.Now these are the names of the descendants of Israel, who came into Egypt, Jacob and his sons —The sons of Levi: Gershon, Kohath, and Merari.
But Exodus 6:18-20 says:At the end of 430 years, on that very day, all the hosts of the LORD went out from the land of Egypt.
Since their combined lifespans fall far short of the total time in Egypt it is obvious that the genealogy in incomplete and some generations have been omitted.The sons of Kohath: Amram, Izhar, Hebron, and Uzziel, the years of the life of Kohath being 133 years. The sons of Merari: Mahli and Mushi. These are the clans of the Levites according to their generations. Amram took as his wife Jochebed his father’s sister, and she bore him Aaron and Moses, the years of the life of Amram being 137 years.
More proof that some of the genealogies aren’t complete is found by comparing Genesis 11:12,
with Luke 3:35,36.When Arpachshad had lived 35 years, he fathered Shelah.
The genealogy in Genesis omitted Cainan. Others people could also have been left out of the genealogies.the son of Shelah, the son of Cainan, the son of Arphaxad.
The creation couldn’t have taken place later than 4,000 BC but it could have occurred earlier.