This is pretty normal actually. Pope John Paul I told the conclave after he was elected, "May God forgive you for what you have done on my behalf." It's a stressful life being Pope - how many people want to spend the rest of their life in the spotlight like that? Besides, anyone who WANTS to be Pope (especially if he wants it so much that it's noticable) has pretty much no chance of becoming Pope. Wanting it hardly shows any humility now, does it?
The sentiment is so expected in fact that the room the newly elected Pope goes to to put on his new dress is called the "Room of Tears."