Strange genders in the database

Alberto (2011-03-08 10:16:29 +0000)
Hello, I've been using the WCA results export, and I've found two "estrange" genders: '?' (4 people) and 'w' (1 person). I thought that maybe these are errors, although maybe I'm forgetting something. Greetings.
Tim (2011-03-11 17:12:35 +0000)
Thanks, I deleted those genders.
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