I saw that too, but my understanding in reading the articles was that the ships returned to port on their scheduled day (as scheduled, no revised itinerary), however, with the disinfecting of the ships, the departures of the following itineraries on those ships would be delayed.
2007 - Majesty of the Seas (Bahamas)
2009 - Enchantment of the Seas (Western Caribbean)
2010 - Freedom of the Seas (Western Caribbean)
2013 - Golden Princess (Alaska, roundtrip from Seattle)