Oh yes they do! They had a bad run with us earlier this year, and we had several reversed charges in a single week, as well as a personal visit from the VP of Canadian Operations to apologize.
It is not to say that AC has to be perfect, but they need to improve (and have been improving) the identification of the need for, and providing timely and appropriate compensation when they mess up. That is good customer service and thus good business practice, and the FTers here who point this out are doing AC a favour instead of just walking away! It is not whining, well sometimes it is, but the OP in this thread was not.