2011-10-03, 04:12 PM
Maybe, and this is a big maybe, when updating to Jump, Nexon leaked more information into the game than they should have (see Bowgun) which may have included some invalid potential stats. Acquiring one of these stats may remove a line. That or Nexon copied something from JMS (which has 1-lined potential... right?). I'm leaning toward the first one since I've never actually heard of a loss of lines.