Seeker "holes" as I call them, are related to former players that jazz2 basically does not unregister. Lets say that Bob hosts a server and Jane joins becoming player 2. After that, Eve who is player 3 joins the game as well, but she becomes bored quickly and leaves at the respawn position.

Now, both the server and all of the other clients have a seeker hole at the position where Eve (player3) left. Let's say that Jane who was player 2 rejoined the game (closing jj2 down first) she would no longer have a seeker hole at the player3 position, but since the server does, her seekers will still go there even if she does not see them. This means that she can be firing missles that she sees hit people, but are really going into a seeker hole.

Now, since this is both a client and a serverside problem, there is no easy solution to it.