Tracker is inaccurate and doesn’t get updated at times. Many here have got eCOPR but their tracker says still in progress. So no need to worry about that.
Yes Portal 1 email means your application is approved in principle.
What is the age of the 4th family member who didn’t receive the letter?
Thanks for the info. My age is 49 and the process was all done under my wife, as she's the one who came as a student. I just work.