Since this is quickly retreating from "Bible" study into "Septuagint" study, I will offer a quick summary and depart for studies of what the BIBLE says.
- Extra-biblical records are not "god-breathed" and are, therefore, prone to error.
- You are misusing the Genealogies (as I have already discussed at length).
- If multiple witnesses writing under the inspiration of the Holy Spirit agree on 430 years, an active attempt to disprove what two or three witnesses have established as fact is not scholarship ... it is anti-Christian apologetics and has no place in the "Christian only Forums".
It was a good question, too bad you were not really seeking an honest answer.