Joins - self join 2 right answer seemingly incorrect

[kennes913]

URL: https://www.pgexercises.com/questions/joins/self2.html

Question is How can you output a list of all members, including the individual who recommended them (if any)? Ensure that results are ordered by (surname, firstname).

memfname, memsname combinations should be unique by nature of question, but I see this in the correct response:

[AlisdairO]

Hey, in this case, the issue you're running into is that there are two members named 'Darren Smith' in the dataset, so it's correct for this case.