Get a load of this then... When trying to book AKL-SCL on the QF codeshare with LA, AA told me it wasn't possible (irrespective of availability) and that it could only be booked under the LA designator.
A challenge to the res agent met with a robust defence until I was able to reel off a long list of all the other bo**ocks AA's European tariffs dept comes out with.
I'm just a punter, why should it be down to me to know their job better than they do?