I have booked LHR-DFW-SJD on ba.com, AA codeshare. The DFW stop was tight but doable at 2 hours.

Because I was impatient to choose seats and BA manage my booking said it can take 48 hours after booking to access through AA, I went into Royal Jordanian to do it. There I saw a notice offering me the chance to change my DFW-SJD to an earlier flight with just a 30 min connection. I didn't accept the change, but I did try ( and fail!) to play around with seat assignments.

Now, manage my booking on BA has the earlier flight with the impossible connection. Nothing has come through by email though, c.f. the usual instant emails for minor things like choosing a meal.

Is this something I should try to sort now? I assume it'll become some AA person's problem in DFW anyway since it's a single ticket.