Vyasa is just a staus.. like a generic name

Vyasa is just a staus.. like a generic name for a poet or scribe.. nothing more. They assign authorship of everything to this composite name

Researchers are of the conclusion that Mahabharatham evolved through two millenniums or perhaps even one millennium more. Some parts of Bharatham would have been added as late as even five hundred years ago. But the core structure, storyline and philosophy have taken solid shape at least 2000 years ago. The main part of Adiparva.. which can be equated to the primary structure of Mahabharatham that goes by the name Jayam was there for 3000 plus years.

But Srimad Bhagavatham is substantially not older than 500 years..perhaps some parts might be slightly older. Not older than 750 or 800 years. The persuasive effect of Bhakti movement in preference to vedantic, advaitic, karmic or yajnic ways are too pronounced in Bhagavatham.

Of course people giving discourse either in Ramayanam or Bharatham or Bhagavatham would either swear or vouchsafe that the contents are authentic according to the occasion and as per the text they deal with. They also would try to bring in reconciliation over paradoxes through very laboured and unrealistic explanations.. and the aam a AdmI audience would lap it up.

But the lines followed are indeed varying and contradictory often. Sensible persons should accept this and should imbibe the spirit of the works rather than dwelling on stories and creating fights. A culture that is continuously flourishing for more than 5000 years cannot be uniform and will not repeat stories like parrots