Welcome to the Forum Caraffa although I am ??? re: your moniker.
For the record, there are a few of us here who believe Card Siri( Gregory XVII) was actually elected as the true Pope in 1958. We are not 'sedes' because we do not believe the chair of Peter to be vacant. It is true we do not know who the real Pope is at this time, but that doesn't mean there is not one.
Also there are those in this Forum whose historical conception has no inkling that there have been more than a few times in European history where Christians have had to go underground-- sometimes for long periods. Along with that, there was often confusion as to who was true Pope.
For whatever reeason, those who cling to the v2 anti-popes would have us believe that there is no precedent for what has happened since 1958. Additionally they either cannot or will not answer the query-- is there such a thing as an anti-pope?
CM is our resident crap shooter as he believes Pius XI & XII to be anti-popes, whereas I do not. However he comes up a winner with the idea that Ben 15 most likely is. Without even considering his doctrinal deficiencies and strange actions, the very election(???) of Della Chiesa is just about the most improbable thing I have ever heard of, moreso even than the abdication(?) of Celestine and the election(?) of the anti-pope Boniface.