I've sent you a private message. Please check.
It appears that you are in the single person view (Find Similar Faces…) of LrClassic. In this case, in the "Similar" section, LrClassic will sort the faces in your current filmstrip according to based on their similarity to the query faces (those "Luis" faces in the "Confirmed" section). Most similar faces are presented at the top, less similar ones would appears at the bottom. The idea is that you can do shift selection a range of faces to confirm it is the same person or tag with a different name.