As gathered from the Air Philippines' website, the said flight was indeed rescheduled. Shown below are the screenshots taken:
Schedule Change Alert: Flights to SURIGAO beginning 10 September-UFN has been rescheduled. Your flight 2P65 will now depart at 11:30AM. Check-in 2hours before the flight at NAIA Terminal 3. We regret any inconvenience. More info? Please call (632) 855 9000 from 6:00AM to 10:00PM or visit www.airphilexpress.com.