The image is cropped on both left and right...her name wasn’t Stanley Jones.
I don’t get what you are trying to say, he identified Maxine as Stanley Ann Dunham. But her name appears (Stanley) as the girl far right, back row.
Have you worked out the name of the mother yet? (I’ve got a huge headache now)
Look at the “official names” for the first row and the second row.
Don’t focus on the names (for the moment)-— just count the commas.
Doing so indicates there were 11 girls in each row. That also reveals how Stanley could be said as being 4th from the right.