Animation events play for all animations when blending?

I'm playing 3 animations:

             //Prioritize the walking animation
             anim["idle"].layer = 9;
             anim["walk"].layer = 10;
             anim["sprint"].layer = 11;
             
             //Play all animations
             anim.Play("idle");
             anim.Play("walk");
             anim.Play("sprint");
             
              //Fade out moving animations
             anim.Blend("walk", 0, 0.2F);
             anim.Blend("sprint", 0, 0.1F);

I blend walk and spring based on the character's forward velocity.

             //
             // In Fixed Update
             //
             if (velocity.sqrMagnitude <= sleepVelocity*sleepVelocity)
             {
                 anim.Blend("idle",1,0.2F);
                 anim.Blend("walk", 0, 0.2F); //Fade out walking animation
                 anim.Blend("sprint", 0, 0.1F);
             }
             else if(velocity.sqrMagnitude > sleepVelocity*25)
             {
                 //Fade in sprint animation
                 anim.Blend("sprint",1,0.2F);
                 anim.Blend("walk",0,0.2F);
                 anim.Blend("idle",0,0.2F);
             
                 anim["sprint"].speed = 1*animationSpeed;    
             }
             else
             {
                 //Fade in walking animation
                 anim.Blend("walk",1,0.2F);
                 anim.Blend("sprint",0,0.2F);
                 anim.Blend("idle",0,0.2F);
             
                 float animspeed = velocity.sqrMagnitude;
                 anim["walk"].speed = animspeed*animationSpeed;
             }

I have events on walk and sprint that generate footstep sounds. However, I often hear events from both animations playing rather than just the heaviest weighted one. How would one deal with an issue like this?