@St. anthony: I was only talking about John XXIII. The Vatican did believe that the preservation of his body is not because of a miracle. I didn't say that it's the same case with all the other Saints.
Not all Popes have preserved bodies. In Pius XII's case, his body started to decompose during the wake that they had to replace the guards on duty every 15 mins because they couldn't handle the stench. He was poorly embalmed.
@rynzco: Paablihan man. Kanang mga incorruptibles ipa check man na.
And yeah, I agree with St. Anthony anang laws that need to be followed.