Using KF miles for upgrade: waitlisted

[cgichard]

• No reply when I tacked this query on the end of another thread, so I'm asking again here.

I wanted a (paid) PE booking MEL-IST in June next year. MEL-SIN was fine, but there is no PE on the SIN-IST flight, so I was booked into Y. Now I have enough points to upgrade that to J, but was told I have to waitlist. Yet when I search for that flight I see that J seats are available, with no "only x seats left" limitation.

Does SQ allow upgrades from Y to J only for a limited number of seats on each flight? I know I'm looking a long way ahead, but is there anything I can or should be doing to facilitate achieving the upgrade? Is it perhaps worth phoning again in case I get a more favourable from a different SQ person? I am KF Silver: does that help at all?

I did read the sticky about waitlists, but it doesn't seem to cover upgrades as a special case.