Actually, AA will notify you IF you have data in the system to let them do it. If you booked via a TA (and Expedia, Orbitz etc.. are a TA) then they notify them.
However, notification is made in order of "change" So...your trip is still at least 35 days away. Those folks with changes in April get notified before May....
Not always! I posted about this both before our trip when they moved two of us to another flight, but left one of us on the old flight and then I posted again after we got back when they moved us all around the plane, after I paid for our seats together. My husband and I took our three y/o grandson down there Feb 4th-11th. We got an email about a month before we left saying there had been a change to my husband's itinerary. Nothing was said about mine or my grandson's.

When we checked, they had moved me and my husband to a different plane coming home, an hour earlier. However, they had left my 3 y/o GS on the other flight by himself.

I immediately called and was told that the first flight was overbooked, so they had moved two of us to an earlier flight. Fine, but you've got to get my 3 y/o GS on that flight too. I'm not leaving him the Orlando airport to catch a flight an hour after ours.

She didn't seem to understand why I was upset, until we realized they had him listed as an adult. Excuse me, when I booked the flight, I checked child. After looking at it again, she admitted she saw he was a toddler and said that since we booked together, she didn't know why they didn't move him when they moved us. She guessed they just thought he was an adult and would be fine on the later flight and we could just meet up in Dallas after our respective flights home

. She then put me on hold for a long time, but finally came back and said she had moved someone else back to our original flight and had our grandson on the earlier flight with us. I had asked her to put us all back on our original flight, but she said it was easier to just move someone from that flight back to our original flight, since both flights were oversold.
Anyway, I thought everything was fine. I did keep an eye on the flights all the way up until the morning we left Dallas for Orlando and there was no more changes and we were all seated together, like we had been originally (only further back in the plane). Imagine my surprise a week later when I checked our boarding passes on the way from WDW to MCO, just to find that even though we had paid for our seats and had been seated together (when I checked the morning of our departure the week before), sometime during the week we were at WDW, they had scattered us around the plane. As soon as we got off the DME bus, I immediately went to the AA desk asking for our seats back, but was told to have the desk agent upstairs handle it. As soon as we got through security and off the tram, I went to the gate agent, who told me that I'd have to have the FA ask when we boarded, but she told me it shouldn't be a problem, as my husband had a good aisle seat and the person in the aisle seat that was sitting next to my 3 y/o GS several rows behind would probably be glad to change with him. She said that I'd probably be stuck in the middle seat I had been assigned closer to the front though. I reminded her that we had paid to choose our seats, so that we could sit together, but she said there was nothing she could do and wasn't sure why we had been moved (probably to accommodate someone else though).

Thankfully shortly before we boarded, we got called to the desk and was given new boarding passes, with all three of us sitting in the first row of coach. Apparently they hold the first row of coach. Either that or they moved someone else to get us together. I know a lady sitting across from us was called up to the desk just before we were and came back excited that she had been given a free upgrade to first class.
All I know is that I normally flew Air Tran from DFW to MCO several times a year (before they got pulled out of Dallas Nov 22nd) and even though the times might get changed occasionally, I've never experienced all the trouble we had with that AA flight Feb 11th MCO to DFW. It was like they couldn't get anything right. We had booked our flights together and paid for our seats. They were the ones who kept moving us around and other than the one email telling us my husband's itinerary had changed, never notified us of the other changes.
