Two InvokeRepeating separate functions turning to work a t the same time

Hi,

In my Update function I have two InvokeRepeating commands that are calling for separate function. I have set it so that the first one will start one second before the other and after that there should always be 2 seconds before repeating again. Everything works fine on a first shot but after this, they start working at the same time even I would kind of like them to "take turns". Any ideas?

And oh, couple lines of code say more than hundred words:

 void Update () {
  if(Input.GetKeyDown("s")){
   if(shooting==false){
    InvokeRepeating("ShootEmpty", 0, 2);
    InvokeRepeating("Shoot", 1, 2);
    shooting=true;
   }
   else if(shooting==true){
    CancelInvoke("ShootEmpty");
    CancelInvoke("Shoot");
    shooting=false;
   }
  }
 }