So you believe that they are, or were popes? It seems that you do. Because +ABL certainly did. He was not a sedevacantist, despite the best efforts of sedevacantists on this forum saying otherwise.
Great posting, Meg, keep up the good work!
Archbishop Lefebvre was utterly shocked by the antics of some of these popes, so much so that he even publicly asked the question as to whether they could be popes, whether a pope could do such a thing, but he never adopted the theoretical, and certainly not the practical, position of the Sedevacantists. To the contrary.
Even on the eve of his death he gave a conference to the Society Sisters at Saint-Michel-en-Brenne on praying for the Pope in the Canon of the Mass, mocking the SVs understanding of this prayer. There is a short YouTube video of this but I can't find it right now.