The problem is, you´re assuming that IRCC´s instructions remain the same over time. For example,in the thread with DelPiero´s comments from 2017, that was absolutely correct in 2017. For some reason, though, IRCC frequently changes the rules for PCCs. It is no longer true. You can see the Date Modified on the bottom of the page:
https://www.canada.ca/en/immigratio...-permanent-residence/police-certificates.html
Date modified: 2018-10-18
This is the danger of reading old threads (or even new ones) instead of referring to the information on the IRCC website. The info on the website is not always perfect, but it is always more reliable than what random strangers say : )