Well, she did say that the POPE had to PERFORM the consecration. So given her belief that Ratzinger is the pope, she holds that he would have to DO the consecration. Currently she's saying it would suffice for him to be visibly present (if they [her phrase] rolled him out in a wheelchair while Bergoglio did it).
She also said in union with ALL the bishops (not just in union with the bishops, as you put it).
So you missed two aspect of what Our Lady said, that the Pope had to do it (you just said it had to be done) and that ALL the bishops had to do it (you just had "the bishops").
I was not intending to minimize these requirements.
But, back to the "being present" phrase...everyone (Francis, Benedict, whatever bishops take part in this) is reading the same consecration formula, including Benedict, so how does Benedict's location matter? He'll be reading the same prayer/consecration as Francis.