The additional documents status was "additional documents are being reviewed" before i got the PPR and It's still showing that, apparently it changes to "Approved" once the COPR has been printed. I emailed them on September 18 asking for an extension for the deadline to submit my Mexican Police Certificate because the deadline they gave me was September 19th, and since the Canadian Embassy in Mexico requested it on my behalf on August 11th, I assumed it was going to take at least one more month to be sent to CIC, but that same day they replied saying they actually received it on September 5, and that they uploaded it to my online application profile. That same day in the evening (September 18) the status from the additional documents box changed to "additional documents have been uploaded. The next morning, on September 19, the status changed to "additional documents are being reviewed", then that same day in the evening, I got the PPR.