Level 1s logging out after dying creates a clone out of them because it can't send them to Danian (possibly because they never entered it?) and are still stuck in the death animation following a battle. They don't appear on the who list but they are viewable.
To get rid of them, you must imprison them first, and then boot them.
It appears it is not restricted to level 1s. Khärnaid, who is level 6, created the same problem.
<Moiraine Damodred>: Hang on, I might be a minute <Joker the Wise>: Vahu, i survived wig you being afk for like 10 fights... i can manage. <Joker the Wise>: with* <Joker the Wise>: Brb eating stuffed peppers. <Moiraine Damodred>: You survived a wig, I'm so proud.
*Hawkus face planting in Mona* <Raigeki >: >: dammit!