I think the way it works is there is a two business day delay to when you actually see any updates they make reflect in your tracker.Got my second ghost update today June 26th. But no change in application status. everything is still under in progress!
For example for my Citizenship test progress update to completed. I checked on June 21st and saw that it said updated June 21st at the top but no actual change in the test status. After two business days (on June 25th) I could actually see the test status updated to completed but the date it said they updated it to completed was June 21st.