The latest CO website edition (with improved UA flight handling) still has a few issues with UA flights:

1. Does not update fare class from Economy to First following a UDU. Got UDU'd yesterday. .bomb shows me confirmed in F, while CO's website still lists me as Economy (V). Seat assignment is listed correctly, however it won't let me change it to a different F seat.

2. CO website is still unable to handle UA flights with a stopover & aircraft change. When clicking on 'change seats', the website will show the seatmap for the first flight/aircraft, but on the View Reservation page lists assigned seats for the 2nd leg.