That's a catechism, and it doesn't (in the section you posted) deal with such matters as heretical or schismatic priests or popes. I very much doubt that Saint Pius X would agree that Mahoney should be obeyed when commanding endorsement of the abomination of sodomy.
"I was asking you for an example of when you corrected the schims's supporters"
Actually, what you said was that you hadn't seen an example, so I asked you for an example of something that needed correcting. If you give me such an example, I'll address it--tomorrow. I'm on Yokohama time.
If you think that has happened you have no reason to be Catholic. Pick a sect that makes you feel comfortable