I am on the phoen with best flights now, the said its PE, a mistake.
Interesting enough when Qantas first brought out R class for the A380, I booked an exconomy ticket Sin - Syd return for S$900 on Qantas website and it was confirmed, "economy not available travel wiill be in First Class".
I also doubted that I would actually get a F suite so I called Qantas and they confirmed that for S$900, I would not receive a F Suite sorth S$5,000, however, they compensated my by giving me 50% of the fare componjent of the economy class fare.