it seems I'm being given a bum steer.
booked J flights for 2x family members via points for 31/12/17 and all good.
Then booked myself & the wife with our then ~9 month old son for same flights in J but on 13/12/17 (on points).
Wanted to put my wife and son on waiting list for the 31/12 (i would still fly on 13/12).
However SQ call centre staff over email said not possible?!?!
