Linecast detects gameObject underneath the collided one

Ive been looking over my code and using other questions answers and using the documentation to figure this one out but I can't find anything. Basically I got a few rows on objects stacked on top of each other and I am using linecast to detect and destroy them when the player runs into them. I've tried just isolating the collided game object into a gameobject variable, tried making the box collider smaller. Nothing seems to work

This is what happens (Keep an eye on the 2 highlighted object names in the Hierarchy):
https://youtu.be/JPA82gzD3Ts

I've been using various stages of this particular code, this is the latest iteration:

 void OnCollisionEnter2D(Collision2D collEnter)
     {    
         if (Input.GetKey ("a") && checkLeft == true && checkBtm == false) {
             countDown -= Time.deltaTime;
             print (countDown);
             collEnter.gameObject.name = "Test";
             spr = collEnter.gameObject.GetComponent<SpriteRenderer> ().sprite;
             if (countDown <= 0) {
                 print (spr);
                 Destroy (collEnter.gameObject);
             }
         }
     }

I should note that checkLeft and checkBtm relate to the 2 of the 3 Linecasts I have assigned to the player and this is currently placed in a OnCollisionEnter2D.

I have worked out that the player seems to somehow first collide with the object underneath the object I am looking to destroy, I found this out by using print(collEnter.collider);.

I'd love some feedback on how to fix this issue as I am completely stuck. I originally had this fixed by using a bunch of tags and y lvl iterations in my code but that got to be a pain in the ass for assigning new tags and it would have gotten even worse as I wasn't even a 3rd of the way through with that.

EDIT: Additional information as requested. Linecast is implemented in the Update function like this checkLeft = Physics2D.Linecast (leftStart.position, leftEnd.position);.

I havent get up a Raycast (but I will do that now, I thought I originally did. So that might just fix all my issues, I'll edit this again if that proves to be true) and The body of the player is is on Layer 2 while the GameObjects I am Destroying are on Layer 1 (Honestly didn't consider this an issue).