Srila Vyasadeva: Appearance of Vyasadeva

                                                                  Q. From SB 1.4.14 we see that Srila Vyasadeva was born at the overlap of Treta and Dwapar yuga. From Srila Vyasadeva's mother to Parikshit Maharaj, there were about 6 generations. My question is how did all of Dwapar yuga get get covered by the passing of 6 generations only?