Indeed. Unless CX659 is one hour late (time when plane door opens).
Delay of CX825 is caused by late arrival of CX828 from HKG. The aircraft (B-LXJ0 was not delayed on a previous flight (from BOS). It was supposed to spend 6 jours on the ground in HKG before taking off for Toronto. But it spent almost 8h. Either a technical/staffing problem, or weather related.. I doubt that it was weather, so you should be entitled to 400 or more.