Weird problem with PHP Breadcrumb Script - php

Question

I'm using Mick Sears' php breadcrumb script - found here:
http://www.roscripts.com/PHP_breadcrumbs-118.html
I've used this script several times with no problems. But with this one site I'm having the weirdest problem... Home page - fine. Level 1 page - fine. But every time I move to a level2 page, the correct level1 crumb is replaced by "Help". The link on the crumb is the correct one for the help page. This happens even if I clear all browser caches and don't go to the Help section of the site at all.
The site is http://www.fastexas.org. The script is there, but I gave the breadcrumb div display:none; until I can figure this out.
This script seems to have been around awhile and I'm wondering if anyone else has seen this problem.

Answer 1

The Breadcrumb Script:
<?php
class Breadcrumb{
var $output;
var $crumbs = array();
var $location;
function Breadcrumb(){
if ($_SESSION['breadcrumb'] != null){
$this->crumbs = $_SESSION['breadcrumb'];} }
function add($label, $url, $level){
$crumb = array();
$crumb['label'] = $label;
$crumb['url'] = $url;
if ($crumb['label'] != null && $crumb['url'] != null && isset($level)){
while(count($this->crumbs) > $level){
array_pop($this->crumbs); }
if (!isset($this->crumbs[0]) && $level > 0){
$this->crumbs[0]['url'] = "/index.php";
$this->crumbs[0]['label'] = "Home";}
$this->crumbs[$level] = $crumb;}
$_SESSION['breadcrumb'] = $this->crumbs;
$this->crumbs[$level]['url'] = null;}
function output(){
echo "<ul>";
foreach ($this->crumbs as $crumb){
if ($crumb['url'] != null){
echo "<li> <a href='".$crumb['url']."' title='".$crumb['label']."'>".$crumb['label']."</a></li> ";} else {
echo "<li class='last'>".$crumb['label']."</li> ";}}
echo "</ul>";}}
?>
Each page begins with something like:
<?php session_start();
$level= '1';
$label= 'Honors Circle';
$url= '/honors/'; include($_SERVER['DOCUMENT_ROOT']."/includes/Breadcrumb.php");
$trail = new Breadcrumb();
$trail->add($label, $url, $level); ?>
or
<?php
session_start();
$level= '2';
$label= 'Districts';
$url= '/honors/district.php';
include($_SERVER['DOCUMENT_ROOT']."/includes/Breadcrumb.php");
$trail = new Breadcrumb();
$trail->add($label, $url, $level);
?>
And to print the breadcrumb trail:
<div id="breadcrumb"><?php $trail->output(); ?></div>