My question how can you still call him POPE, when you know what you know and believe what you believe about Francis?

Not to answer for Matthew, but I gather the "who are we to judge" concept most probably plays a role here.

A) It is no secret these days that the overwhelming majority of people believe salvation (not conversion) is available for people in false religions, who could be invincibly ignorant (if that even applies anymore) through no fault of there own. Even though they die in their false religion they are saved by the Catholic Church and do not die as Muslims, Jєωs, Buddhists, etc...., and "who are we to judge" is the typical response when questioned.

B) I believe the same principle is being applied to Francis, "who are we to judge" whether Jorge Bergogglio is the Pope or not?

To remain consistent if anyone holds A as their belief then they have no reason to question someone who holds B to be true.

However if a person denies A then by all means questioning someone who holds to B is a valid.

No one has the right to judge his or anyone's soul however we have a right to judge his actions, and the Vicar of Christ, God's representative on earth can not lead souls outside the Church that He, Himself, God founded.  That is impossible, and that is what Francis is doing.  He has judged himself, it is obvious that he is the God's representative, to say so is an INSULT TO GOD, of which we who know the Truth will have to answer for.  

God can not deceive us nor can He be deceived.