I tried for about 6 months to get an AC trip in A and L class to post 100% mileage and finally gave up. I received numerous responses such as yours, EVEN after I called AC and Aeroplan. They confirmed that I was correct, confirmed the mileage which they submitted to UA, and even offered to send it to UA directly if I could give them contact information.

UA refused to acknowledge any error and I never did receive the full mileage.