Perhaps Birth Rebirth cycles work this way
the Entire Journey of your Soul from the most base consciousness to Human and Beyond in all your past life's leads to your current one's from rise to fall and again the dashas there experiences a person has in their life is a smaller version or fractal of each life they have lived
the Karma or decisions one takes in each such period to cope with the situations that arise at these times determines whether bad patterns start to loose hold and good patterns begin to expand or the opposite
so this single life is a smaller fractal of all your previous live's and each phase of life to the most tiny division of time reflects it in experiences and situations thus your past can never leave you unless you resolve it in the present and avoid or increase the repetition in the future life and moments