As i know, there can never be 2 POPES at same the time, there is only one pope in the world at a time. And again there is no such thing as to resignation as a pope, just as i said previously, that being a pope is a life time service to God, the pope have to service God till death before a new pope should be elected. We can't have 2 captain in a ship . At 86, as a pope he should be strong to continue to do the work of God no matter what, whom the Lord calls he qualifies and strengthen him. to do his job
As a pope, you serve either till you die or you resign, that is it according to the canon law..fine, it has being a long time a pope resigned, they usually stay till they die but let's not forget that all though he is a pope he is also human...As you stated, he is 86 therefore he isn't a child, he must have thought dis through. He feels he should resign so a stronger person can take over isn't that a sensible thing? He might have worked for a shorter time compared to John Paul II but go ask priests how well he worked and you would realize that he worked so well...