Got a double complimentary upgrade at T-72 for an LAX-MIA 777 (3 class), i.e., from Y to F.

I'm expecting AA to catch it; I'm sort of worried that somehow they'll put me back into coach (as opposed to J) when they figure it out.

(The double upgrade error happened to me once or twice before on this route, caught before day of departure and put back into J).

Has this happened to anyone lately? Should I be proactive with AA (to help ensure getting seated in J?). The flight is currently J7.