Roberto de Mattei : Benedict “seems to be convinced of still being Pope.”

"Quoting Cardinal Brandmüller, de Mattei said “Canon Law doesn’t recognize the figure of a Pope Emeritus.” For Benedict to still dress in the white papal vestments and to still live in the Vatican “creates confusion,” de Mattei told LifeSiteNews. Benedict “seems to be convinced of still being Pope.” But “it is impossible that two Popes can exist. The Papacy is not dismountable: there can be only one Vicar of Christ.”

Cardinals can declare that a heretical pope has ‘lost his office’: Church historian 

In Argentina Bergoglio was already public , notorious and contumacious  heretic , therefore his election is invalid and null. Bergoglio has never been a legitimate pope.