For some of my bookings, at some point after the original booking was made, AC decided that the return journeys are actually individual flights. The first trip was booked in Business Lowest and the second was booked in Latitude and upgraded to Business. Both were cash paid bookings.




This makes it impossible to change the return journey online.

Also, as this was discussed upthread, here is another example of a booking made in Business Lowest showing up as 'Mixed Cabin':