getoutofmygalley:
I think you are correct about the OPM flying as number 5 for my coaching/check flight. One of the crew members mentioned that another sccm showed up on her roster by now. Last time I checked it was only me, 2 FA and the OPM but obviously that changed now. Maybe they were waiting for me to pass the training course or something? Shouldn't make much of a difference anyway.
Thanks again for all your advice!