Dear sages,

I am flying LAX-SFO-Onward tomorrow. Upgrade confirmed months ago with a regional.

Just got the following email from United:

"We are not yet able to confirm your request for an upgrade on your flight from Los Angeles, CA, US (LAX) to San Francisco, CA, US (SFO). While your upgrade request will no longer appear in your reservation, you will automatically be added to the upgrade standby list after you complete check-in and receive your boarding pass for this flight."

Mind you, I have 4 legs in the itinerary. The one regional is being used for all 4. Only the last leg never confirmed.

Is this email basically (clumsily) saying my final leg is still unconfirmed? Or perhaps there is a downgauge of aircraft, and my LAX-SFO leg is now in coach (though online, it still shows confirmed in F)?