There is an active thread on this issue in the
UA Forum.
The Award Seats themselves are available:
[KVS Availability Tool 7.3.6/Diamond - Awards/StarAlliance-7D]
Code:
ICN Seoul Incheon Intl KR [RKSI]
SYD Sydney Kingsford Smith NS AU [YSSY]
SUN 01 Jun 2014 (01 Jun 2014 - 07 Jun 2014) | 1 Seat
Carrier Flight From Depart To Arrive A/C St Availability
--------- ------ ---- -------- ---- -------- --- -- -------------
OZ 601 ICN 20:30 SYD 07:40 +1 772 0 FS/ CS+ YS+
OZ 601 ICN 20:30 +1 SYD 07:40 +2 *** 0
OZ 601 ICN 20:30 +2 SYD 07:40 +3 *** 0 FS/ CS+ YS+
OZ 601 ICN 20:30 +3 SYD 07:40 +4 *** 0 FS/ CS+ YS-
OZ 601 ICN 20:30 +4 SYD 07:40 +5 *** 0
OZ 601 ICN 20:30 +5 SYD 07:40 +6 *** 0 FS/ CS+ YS-
OZ 601 ICN 20:30 +6 SYD 07:40 +7 *** 0 FS/ CS+ YS+
Thanks! turns out this is UA's problem.