My rotation affects a value it should not.

Ok, first off, sorry for asking a lot of questions, I have a lot of problems, lol. Anyways,I have this system (based on Eeteski's but changed) to count how much "steps" I took (even though it does not actually do that) and then adds bob to the gun. The step counter looks like it works the same no matter what direction I am facing, but something it the SmoothDamp is screwing up and adding more or less bob depending on which direction I am facing.

 //Variables
 var gunBobAmountX: float = 0.05;
 var gunBobAmountY: float = 0.025;
 var gunBobSpeed:float = 1;
 var currentGunBobX: float;
 var currentGunBobY: float;
 var stepCounter: float;
 var gunBobXVelocity: float;
 var gunBobYVelocity: float;
 //The top three variables' values have been changed in the inspector.
 
 //code
 
 //Counts the amount of distance moved
     
     stepCounter +=  walkScript.aimingWalkSpeed * gunBobSpeed  * Time.deltaTime;
     
     
     
     //Bobs the gun
     if ((Input.GetAxis("Horizontal") || Input.GetAxis("Vertical")) && walkScript.GetComponent(PlayerMovementScript).grounded == true)
     {
         currentGunBobX = Mathf.SmoothDamp(currentGunBobX, Mathf.Sin(stepCounter) * gunBobAmountX, gunBobXVelocity, stopBobTime);
         currentGunBobY = Mathf.SmoothDamp(currentGunBobY, Mathf.Cos(stepCounter * 2) * -1 * gunBobAmountY, gunBobYVelocity, stopBobTime);
     }
     else
     {
         currentGunBobX = Mathf.SmoothDamp(currentGunBobX, Mathf.Sin(timer ) * standingGunBobAmountX, gunBobXVelocity, stopBobTime);
         currentGunBobY = Mathf.SmoothDamp(currentGunBobY, Mathf.Cos(timer) * -1 * standingGunBobAmountY, gunBobYVelocity, stopBobTime);
     }

I don't understand what can possibly be affected based on what direction I am facing/moving. Thanks!