"At the moment, there are no Business Class upgrade award seats available
from Hong Kong to Singapore and between Hong Kong and Vancouver on your
preferred travel dates. If we can confirm any seats by 22 June 2016 we
will definitely let you know, otherwise, your upgrade flights will be
automatically cancelled"

That's what he said. He knows that SIN-HKG is infact available. So I don't think I misinterpret the meaning. It will be canceled if the SET (the way he put it) is not confirmed. Which is all or nothing.

Maybe you are right about the mixed class. But, Not all sectors have PEY.

I did reply their last email said that I'm willing to do a one-way upgrade as they suggested. We'll see what happens next. Fingers crossed ��