I purchased two tickets on the same PNR for my spouse and myself on AA. The itinerary includes AA codeshares operated by BA in addition to true AA flights. On my ticket receipt it shows OK status on all flights including codeshares. On my spouse's ticket it shows CTRL by the BA codeshares and OK on the AA flights. If I purchased both on the same record at the same time, why does CTRL appear? For accuracy, these are for flights that occur next June, 2025.