But you have to take into consideration that Fr. Jenkins looks at this with the sede mindset. Which is to say that he starts out with an empty chair, and per the sede mindset, the idea of two churches itself is a mere reinforcement of that mindset.
Actually, as revealed in multiple episodes of What Catholics Believe, Fr. Jenkins’ mindset is this:
“I don’t dogmatically say that the postconciliar ‘popes’ aren’t/weren’t actual popes; I just don’t see how they could be.”
Hence Novus Ordo Watch et. al. accuse him of fence-sitting on the sede issue.