Princess has an official statement on their website which includes the results of their preliminary investigation.
I suppose the good news (if you can call it that) is that the Captain was not notified of the people in distress. It appears to have been a breakdown in communication in relaying the passenger's concern.
News Article : Princess Cruises
I do believe the results as Captain Perrin has been with Princess for a long time and has helped those in distress on the ocean before.