Ok guys...
Rules are changed for BKK/SIN/CGK/SGN/HKG/GRU on Amadeus. Probably for others as well. I was not in the office today and came back home to see the messages.
AP.ADVANCE RES/TKT
RESERVATIONS FOR ALL SECTORS ARE REQUIRED AT LEAST 7 DAYS BEFORE DEPARTURE.
Go and get the seats!
PS: Updating the first post.