Yes, and there are other numerous threads on this - when searching for flights, availability for all connections will show based on the lowest amount available for all flights. So the flight from IAD on the first connection has different availability, and based on that, it looks different for 895. Once booked, it will show the segments availability seperately when looking at your itin. To see true availability for 895, you'll need to do a search for ORD-HKG.