unity3d - RaycastHit Randomly Gets 2 Hits -

i've been following tutorial online while , far gone pretty well. problem have raycasthit. @ first glance seems working pretty well, every , seems if 2 hits. have set every time press mouse button, animation go off player swinging club , ray sent player(actually gameobject parented first person camera) enemy. instead of gameobject being destroyed in 2 hits, every , then, destroyed in one.

#pragma strict  var thedamage : int = 50; var distance : float;            var maxdistance : float = 1.5; var thesystem : transform;   function update ()                                { if(input.getbuttondown("fire1"))  {    animation.play("attack");  } }  function attackdamage ()  { var hit : raycasthit; if(physics.raycast (thesystem.transform.position, thesystem.transform.transformdirection(vector3.forward),hit)) {                                             distance = hit.distance;  }        if (distance < maxdistance) {                                        enemylogic.applydamage(thedamage); } } 

&&

#pragma strict  static var health = 100;  function update () { if (health <= 0) { dead (); } }  static function applydamage (thedamage: int) { health -= thedamage; }  function dead () { destroy (gameobject); }