Of the three Synoptic Gospels, (Mark, Matthew, and Luke) there are three parts: those passages common to all three (copied from Mark into the two later Gospels,) those parts that are common to only to the two later works (drawn from a document German scholars called "Q") and passages that are unique to a single Gospel (in the case of Matthew and Luke, either fabricated de novo or drawn from some still unknown third source.) Since Luke makes no attempt to make Jesus a member of David's house, the other two authors were forced to each independently come up with their own lineage. I actually don't know why more versions of the New Testament do not have these two disparate accounts harmonized, like the Lord's Prayer usually is. One thing is practically certain - neither genealogy accurately reflects real events.