It is possible that CO is providing additional Upgrade Availability to its Elite members (in which case, logging-out should make no difference, since your status would still be attached to your PNR).
I think the CO system upgrade is a more likely hypothesis at this point. My non-status wife's PNR (completely separate from mine) was also showing 3 seats for upgrade. Also, when SWUs were applied to the itinerary, all segments cleared immediately.