I submitted a missing Avios/TP claim.

By chance, I submitted another unrelated claim today and noticed a "Rejected" to my earlier claim for this DOH-KUL sector. I did not receive any communication for this rejection, hence I called up BAEC to enquire why. They did not know the reason either and simply noted my details (ticket number, booking reference etc) for another submission (which I can't see in the system).