I've been an AAdvantage Executive Platinum member for many years and am approaching 2 Million Miler miles, but I'm quitting American Airlines today and probably moving to United. This is why. I had priced a multi-city ticket on the aa.com website in Sept, but it was too expensive (ca. $2500) so I put it on hold to look for a cheaper alternative. I called the EXP desk and the agent tried an alternative for me and continued to hold it. When I logged onto aa.com to see my itinerary, the price was now ca. $1500. This seemed too good to be true. Since I was flying through DFW at the time, I checked with the agents at the Admirals Club to make sure that it was right. They confirmed it, and I bought the ticket with them. My trip started at the end of October, and will conclude in a few days. However, when I was in Paris on Jan 2nd, I got a message to contact the EXP desk. When I called them, I was told that they need to collect ca. $1200 more or else they will not allowed me to fly back to the US. This seems like extortion. Apparently, the EXP agent who had helped me back in Sept made a mistake and stored part of the itinerary separately (even though online it showed the entire itinerary and the ca. $1500 price) and the agents at the DFW Admirals Club also made a mistake when they confirmed that the price was for the entire itinerary. Somehow no one noticed the mistake until 3 months later. Anyway, I had no choice but to pay as I wanted to come back to the US. I contacted Customer Relations at AA and at first they offered me $200 and then $600 but not the entire additional collection. The Customer Relations agent that I spoke to argued that the Admirals Club agent are not trained to issue tickets and I should know that if something seems too good to be true, it is. He wasn't concerned that I was leaving AA, which seems like a bad decision on their part because I will be flying 100k+ miles each year for the next 20+ years. I decided to buy the ticket because of the price, and if AA made a mistake, they should own up to it and realize that it's not worth losing a loyal customer who consistently pay extra (over United fares) to fly AA over ca. $1200.