I went from Bronze (no seating in profile) to Qantas Club Bronze (seating in profile) to Qantas Club Bronze (no seating in profile) to Qantas Club Silver (no seating in profile) to Gold (seating back in profile).

I actually posted about it here a few months back, and others came back with the same results - no seating preferences ON-LINE for Bronze or Silver, but still there for Gold and Platinum (consistent with what I found).

Seems like they may have fixed it form some QC members.

Dave