Dusk of Oolacile after Manus

I just want to deny the fact that after you kill Manus and Dusk appear. If you kill her there, she doesn't drop 10 humanity. She only give souls (2000 in NG+)

http://darksoulswiki.wikispaces.com/Dusk+of+Oolacile#

She doesn't drop anything afaik, unless there's some trick to it. Manus, on the other hand, drops 10 humanities when defeated, so I'm guessing the player killed her while Manus dropped them.