Are you allowed a free stopover if making Krisflyer Business Saver open jaw redemption?

Wondering if anyone is familiar with the following:

Called Singapore Airlines (131011) to redeem an open jaw round-trip SYD-BKK; PEN-SYD business saver award flight. I want to utilise the complimentary stopover in Singapore for 5 nights, on the way back from PEN. Agent advised that utilising the open-jaw option is considered by Singapore Airlines as using up my complimentary stopover, and as such I’d need to pay the US$100 fee if I wanted to stopover in Singapore on my return journey to Sydney. Agent advised that these are per Krisflyer award T&Cs.

However I’ve read through the entire T&C, and cannot find any explicit term that suggests ‘Open Jaw’ is considered as a ‘Stopover’.

Has anyone out there had success in:

  1. Redeeming a round-trip business saver award flight on Singapore Airlines - with Open Jaw; and
  2. Received a complimentary stopover in Singapore?

Yes it will cost $100. Have not read the t&cs but it is a widely known fact .Even the search results page tells you of this.

Not much to pay for the added flexibility open jaw gives you

Cheers - have proceeded with the booking.  Managed to snag 6 seats, all on desired dates and time.  The availability of Singapore Air reward seats is incredible.