Oh, I do want to discuss; in particular I want evidence for the existence of the human Jesus of Nazareth that isn't anecdotal...
Okay, so this guy Jesus never existed, this group of apostles completely made him for their own fame and glory? Then these apostles and the other witnesses were crucified, stoned, burned, for claiming this guy not only existed and died, but rose from the dead, yet they knew deep in their hearts that it was all a lie? And this makes more sense than this guy Jesus walked the earth and was born in 6 AD and died 33 years later?
So now lets go into why things were recorded when and how they were.
Well, lets begin with the mix-up of dates listed. You seem to be under the assumption that it was common knowledge when all this was recorded that 0 started at 0 AD and being off by 6 years is proof the guy never existed. Well, it wasn't till in the future when 0 AD was considered the year of our lord, and everything backdated as best as possible at that time.
Now, the apostles. They witnessed him die. They were at a loss of hope. They though the story was over, and then 3 days later the guy comes back to life. A while later, Pentecost comes, and from there they go baptizing others and witnessing about the Messiah. They dedicate their lives to doing this, and you expect them to keep a detailed journal of what they did, how they did it, and so forth. That's just plain ridiculous. So, they are getting old and nearing death. Some of their letters to other Christians are still preserved, like Peter and Paul's as well as some others.
St. John the Theologian particularly starts writing things down. St. Luke the Physician, watching over Jesus Christ's own Mother, the virgin Mary, also starts writing things down and gets the perspective of Mary, explaining why things in a society never spoken of except by the women when the women were alone are suddenly being mentioned in his gospel.
Our records are still found few and far between at this time with very few of the Church members have written records. The vast majority have only heard the message, not seen it's written form. The Church is still going strong, persecution gets very great, St. Peter and St. Paul are martyred, yet this group of people called Christians still proclaim this message to their death. Nero comes along and kills Polycarp. His gardens are mentioned in writings as gardens of burning Christian human torches. Yet this belief in this Christ who came less than a century prior is still heavily confessed publicly when Romans try to force these Christians to make sacrifices to pagan gods as a show to denounce their "atheism", as the Romans referred to it. The church fathers write vast amounts of letters and apologies that remain preserved.
I'll end hear before we get to Constantine, but you can honestly without a doubt in your mind say that all this doesn't make you the slightest bit skeptical about your opinion of Jesus being a myth?