that was also what spyros said in his thread..
but are you sure he was newly listed?
my scout list is updated today but not yesterday
so i think what you saw is a player on an old list (today morning in your timezone - before maintenance) and then got out from your list after being updated today (today afternoon in your timezone - after maintenance)
are you sure? we've been experiencing scout list being updated two days in a row..
i would like to think that the day is also random but only 8 update times in a season..