Congrats. I too have updates on May 16th and May 25th too but no PPR. WHen did you get the email did anything change on your application when the ghost updates happened? What is your VO?
Pasting the info here since some folks cant see my signature.
AOR : Jan 16 2018
IP1, MEP, ADR : Feb1 2018
ADR submitted : Feb 16 2018
Ghost update and IP2: May16 2018
Ghost update 2 : May 25 2018
PPR from CPCO Ottawa - May 25 2018
To answer your questions, I got ghost update which I noticed one hour before PPR mail. VO -- Ottawa.