A trigger is activating scripts of other triggers

So I am trying to make a line of platforms that rise up as the player enters their triggers, supposedly each platform has it’s own trigger.

for the first five everything works fine but the sixth and sventh rise up when the player steps into the first one( each trigger can only be linked to one platform )

I also tried putting a different script on them but to no avail

Picture:http://s927.photobucket.com/user/FRESHERMAW/media/2014-05-02_0024.png.html?filters[user]=109301372&filters[recent]=1&sort=1&o=0

here’s the script I am using

using UnityEngine;
using System.Collections;

public class Trigger_Test : MonoBehaviour {
	public GameObject stair1;
	bool risertrig=false;
	public float height=76f;
	public float speed=1000f;
	// Use this for initialization
	void Start () {
	
	}

	void OnTriggerEnter(Collider trigger){
		if (risertrig == false) {
			risertrig = true;
		}
	}

	// Update is called once per frame
	void Update () {
	//	Debug.Log(stair1.transform.position.y);
		if (risertrig == true) {
			print ("true");
				}

		if (risertrig == true) {
			print ("false");
		}


		if(risertrig == true){
			stair1.rigidbody.velocity=transform.TransformDirection (Vector3.up * speed *Time.deltaTime);

		}

		if (risertrig == true) {
			if (stair1.transform.position.y >= height) {
								risertrig = false;
				stair1.rigidbody.velocity=transform.TransformDirection (Vector3.zero );
						}
				}

	}




}

You should make sure every trigger is on the same layer and then uncheck collision between the layer and itself using the physics layer matrix (found in Edit → Project Settings → Physics/Physics2D).