Strange issue changing the animation state

The issue is about changing the animation state. Sometimes, as you can watch in the video beneath that, the shots don't work properly. The strangest thing is that it occurs few times and (aparently) radomly.

Note the seconds 0:15, 0:36, 0:41 and 1:06. http://www.youtube.com/watch?v=LGZ30x-DBRA

If there are any sintax error is due to I translated the main code to make it easier to read. The comments or variables in spanish are not related whith the animation. I am asking for help cause I have no idea what kind of pattern follows this issue, so I can't fix it.

Sorry, I know it's a lot of code.

Thanks.

Magnum.cs

     void Update () {
         
         
         
     // COLLISION AND SHOTS
     RaycastHit hit;
     
     //If collision exists
     if(Physics.Raycast (transform.position, transform.forward, out hit, 50)){
         if (hit.collider.gameObject.tag == "enemy"){
             texturaPuntero.color = Color.red;
             
         } else {
             texturaPuntero.color = new Color(0.5f,0.5f,0.5f,1f);
         }
     }
     
     if (Input.GetButtonDown("Reload") && (!LogicaAnimaciones.boolNowShooting || !LogicaAnimaciones.boolNowShooting)){
         if ((InformacionArmas.magnumBalasFueraCargador > 0) && (InformacionArmas.magnumBalasCargador < capacidadCargadorMaxima)){
                 
                 Reload();
                 LogicaAnimaciones.boolReload = true;
             
         } else {
                 audio.PlayOneShot(magnumWhithoutAMMO);
         }
     } else {
         LogicaAnimaciones.boolReload = false;
     }
     
     
     //Shooting
     if(Input.GetButtonDown("Fire1") && (!LogicaAnimaciones.boolNowShooting || !LogicaAnimaciones.boolNowReload)){
 
         LogicaAnimaciones.boolShot = true;
         
         RaycastHit hitMagnum;
         
         if(Physics.Raycast (transform.position, transform.forward, out hitMagnum, 50)){
                 
             tagColision = hitMagnum.collider.gameObject.tag;
             
             //Si hay colisión y SÍ ES UN ENEMIGO
             if (tagColision == "enemy"){
                 if (InformacionArmas.magnumBalasCargador > 0){
                     Disparar();
                     
                     //Distingue si le damos en la cabeza o en el cuerpo
                     if (enemigo.name.Equals("head")){
                         enemy.transform.parent.SendMessage("UpdateVida", headDamage);
                     } else {
                         enemy.transform.parent.SendMessage("UpdateVida", bodyDamage);
                     }
                 } else {
                     audio.PlayOneShot(magnumWhithoutAMMO);
                     LogicaAnimaciones.boolShot = false;
                 }
                 
                 
             //IT'S NOT AN ENEMY
             } else {
                 
                 if (InformacionArmas.magnumBalasCargador > 0){
                     
                     Disparar();
                     LogicaAnimaciones.boolShot = true;
                     
                     //MINOR CODE
                     
                 } else {
                     audio.PlayOneShot(magnumWhithoutAMMO);
                     //No dejamos que se reproduzca la animación
                     LogicaAnimaciones.boolShot = false;
                 }
 
             }
         //IF THERE IS NO COLLISION
         } else {
             if (InformacionArmas.magnumBalasCargador > 0){
                 Disparar();
             } else {
                 //... Reproducimos el audio
                 audio.PlayOneShot(magnumWhithoutAMMO);
                 //No dejamos que se reproduzca la animación
                 LogicaAnimaciones.boolShot = false;
             }
         }
         
     } else {
             LogicaAnimaciones.boolShot = false;
     }
 }
 
 
 void Disparar (){    
     //MINOR CODE
 }
 
 void Reload (){
     
     //MINOR CODE
 }

Animation.cs

     void FixedUpdate () {
         MagnumAnimaciones();
     }
     
     //MAGNUM -> Animaciones
     void MagnumAnimaciones(){
         
         //DISPARAR O CARGAR. Los bool le llegan de MagnumComportamiento
         animacionMagnum.SetBool("Disparar", boolShot);
         animacionMagnum.SetBool("Recargar", boolReload);
         
         boolNowShooting = animacionMagnum.GetCurrentAnimatorStateInfo(0).IsName("Base Layer.Disparo");
         boolNowReload = animacionMagnum.GetCurrentAnimatorStateInfo(0).IsName("Base Layer.Recargar");
         
         //LÓGICA PARA ANDAR:
         //Si se mueve...
         if (!boolNowShooting || !boolNowReload){
             if (Input.GetButton("Horizontal") || Input.GetButton("Vertical")){
                 //... hace que ande
                 animacionMagnum.SetBool("Andando", true);
                 
                 //Si no se mueve...
             } else {
                 animacionMagnum.SetBool("Andando", false);
             }
         }
     }