I track my accounts on award wallet.

I notice now that when I book a reservation, usually for a partner award on *A, with UA miles, I get an original email with it correctly listed.

A few days later, I get a second email, where the carrier has been crossed out and United has been substituted for the carrier.

e.g., LH flight listed correctly becomes united flight
Here in the example below, the name Thai airways is now in red and crossed out (the formatting does not show on cut and paste)
I know UA does not fly BKK to FRA, but what about the poor soul who does not?


Airline Name Thai Airways. United
Departs August 2, 2012 11:45 PM
From Bangkok (BKK)
Arrives August 3, 2012 6:00 AM
To Frankfurt (FRA)
Aircraft Boeing 747
Meal None
Seats ---