Arriving in Italy... I have a possible answer
OK for those that complained why they exit the volcano near Italy I have a possible answer.
When they got down to the center of the Earth the land that they traveled across was much smaller. And the volcano shafts they entered and left in were set at angles. So it wouldn't matter if the two shafts were a day apart at the center of the Earth because they were at an angle to where they were walking they could exit in any country, in this case near Italy...