The official explanation is that one lineage is patriarchal, the other matriarchal. But you're right, there's so much disagreement between the gospels that people have invested all sorts of effort in "harmonizing" them. The hand-waving dismissals are generally along the lines that different authors had different emphases and perspectives, interviewed different witnesses who in turn had different perceptions and perspectives. But that only goes so far, and not nearly far enough to provide the desired "harmony". Also ... if the Bible is divinely inspired and inerrant it would not exhibit such differences and no explanations would be needed.

Only Mathew and John were around, Mark was only a kid and Luke did not even know about JC until after the crucifixion.

Look...look, look..... it is all quite simple, you just have to understand that you are an ignorant heathen piece of scum, who likes to go about damaging people's testimonies with your ill informed facts and inconvenient truths and you are going to burn in hell forever for it.
Bless you my child and shut your gob while we tie you to this stake and burn you to death with God's holy, loving cleaning fire.