Let us not forget the image of her standing in front of the screen that had the word ALONE on it. At any point in the presentation did she say she was not alone? I recall there were many uses of the word "I".
The presentation was 30 April 2016 at the Museum of Flight, long after any clarification should have been made. Image is at 5:30 in the linked video.
https://www.youtube.com/watch?v=Xw4ca2CoVc4
Had this been filmed prior to the flight(s) then it could be argued that there was a plan to fly alone/solo/sole, but to openly continue the charade long after the flights had ended and the awards given is blatantly wrong.