I was nominated for AOA as a junior (only 4 in our class of 100). However, only 2 were selected this year. Senior AOA at my school isn't until September, usually 2-3 weeks after ERAS is open. In my opinion, this isn't worth waiting to submit your application.
So with that in mind, does it look weird or awkward to list AOA junior nomination on your CV if you weren't selected? Sorry for the neurotic question.
I would not list the nomination to AOA. I would submit your application as soon as it is ready to go and I would add the Senior AOA to the submitted application if you are selected.