If I'm understanding you correctly, you seem to hold a definition of "papal infalibility" which is considerably more expansive than the one held by the Catholic Church. Perhaps you have it confused with "impeccability"? --- which would mean a Pope supposedly could commit no error, make no blunders, hold no mistaken opinions, and commit no sins? --- which is
not a Catholic doctrine.
Don't feel I've put you down here, as this is a very common misconception among Catholics and non-Catholics alike.
(Sigh.)