Same thing happened here -- I had the only one day return trip booked, and now they have us stopping at Miami first so we will miss our CHT connection. So they have me staying in Miami overnight, and getting home the next day. I was also told there would likely be more schedule changes up until the travel dates, and try to log in every couple of weeks to see if any changes are made. I asked if the one day return flight reappears, can I move back to that, she said I would be able to do that. American was leaving SXM at 3:25 p.m, that is now 5:08 pm. That didn't help, either.