Just to clarify a couple of points...
FACT 1: An infant ticket cannot be bought online... only over telephone or at SIA office. When making the booking, you can request a bassinet seat and confirm it on the spot. Once confirmed, it's guaranteed. If you don't confirm it, you're a bloody idiot. It's your fault, not the airline's. They will even confirm whether you require a baby's meal or post-weaning meal... the lengths that SIA go to in order to accommodate infants beats any other airline in Asia hands down...
FACT 2: Of course flights and itineries booked out of Singapore can be changed by calling the local office in Chinese cities. Happens all the time and in fact the waiting time is less than the SG office and in our experiences, more efficient. We've done it many times. Only downfall is the office in Shanghai is closed on Sundays
FACT 3: Any itinery is as good as the organizer (regardless of their race)... if u don't do your homework up front, expect that u might not get all your preferences, even as a frequent flyer.
Certain priveleges come with being a holder of a gold kris flyer card or pps club membership, but this does not extend to being able to take a bassinet seat from a traveller with confirmed bassinet for their infant. Something doesn't add up with the original article here.