Weirdest thing ever! I just checked in for my flight (SFO-FRA) for which I paid Premium Plus and it shows me as having been upgraded! I am also on the waitlist for Polaris which makes sense.
However, my connecting flight SAN-SFO which is a B fare does not even have me on the upgrade list.
Seriously weird things happening with Premium Plus bookings and upgrades - Hope United looks at this issue.
-My B fare for domestic not listed for upgrade.
-My R fare is shown as an upgrade.