Overlap sphere radius problems

I have a little melee function in the code below. The problem is that for some reason the radius of the overlap sphere doesnt seem to work properly, a radius of 1 seems to encompass an area far far greater(more like 10). Secondly nothing actually happens if the object you are trying to melee is at point blank range.

With the dist < Range the issue of limiting your own melee range seems to be fixed but that hardly seems ideal, otherwise whats the point of the radius? And the issue of a point blank attack is still a problem.

Using Gizmos.DrawWireSphere the overlapsphere appears like it should be in the correct place, just I have no idea why it doesnt function as I thought it should

         var colliders = Physics.OverlapSphere (transform.position, 1f);
         foreach (var hit in colliders) 
         {
             Vector3 dir = (hit.transform.position - transform.position).normalized;
             var direction = Vector3.Dot (dir, transform.forward);
             if (direction < MeleeDirection)
             {
                 continue;
             }
             float dist = Vector3.Distance(hit.transform.position, transform.position);
 
 
             if (hit.rigidbody && dist < Range) 
             {
                 HealthManager targetHealth = hit.transform.GetComponent<HealthManager>();
                 if (targetHealth)
                 {
                     targetHealth.TakeDamage (damage, tr.forward);
                     hit.rigidbody.AddForce (300, 300, 300);
                     TNManager.Create(gibsPrefab, hit.transform.position, hit.transform.rotation);
                 }
             }
         }