My first snippets seem to override eachtother? Revolution 2.0.0-rc-2 rev6923

<?php
$firstcriteria = $modx->newQuery('modResource');
$firstcriteria->where(array(
   'parent' => '3',
));
$firstcriteria->sortby('pagetitle','ASC');
$firstlijst = $modx->getCollection('modResource', $firstcriteria);
$first="parents:";
foreach ($firstlijst as $firsteen){
	 $first=$first."<a href=\"".$modx->makeUrl($firsteen->get('id'))."\">".$firsteen->get('pagetitle')."</a> ";
}
return $first;
?>

<?php
$lastcriteria = $modx->newQuery('modResource');	
$lastcriteria->where(array('parent' => '5',));
$lastcriteria->sortby('pagetitle','ASC');	
$lastlijst = $modx->getCollection('modResource', $lastcriteria);
$last="children:";
foreach ($lastlijst as $lasteen){
	 $last=$last."<a href=\"".$modx->makeUrl($lasteen->get('id'))."\">".$lasteen->get('pagetitle')."</a> ";
}
return $last;
?>

<?php
if ($categorie<>0){
	//get current id of the current page to get the children
	$currentResource = $modx->resource;
	$currentid=$currentResource->get('id');

	//get the children
	$lastcriteria = $modx->newQuery('modResource');	
	$lastcriteria->where(array('parent' => $currentid,));
	$lastcriteria->sortby('pagetitle','ASC');	
	$lastlijst = $modx->getCollection('modResource', $lastcriteria);
	
	if (count($lastlijst)<>0){
		$last=$currentResource->get('pagetitle').": ";
		foreach ($lastlijst as $lasteen){
			 $last=$last."<a href=\"".$modx->makeUrl($lasteen->get('id'))."\">".$lasteen->get('pagetitle')."</a> ";
		}
	}
	else{
		//zoek de parent van de huidige pagina en toon daarvan de kinderen
		$parentResource = $currentResource->getOne('Parent');
		$parentid=$parentResource->get('id');
		
		$lastcriteria = $modx->newQuery('modResource');	
		$lastcriteria->where(array('parent' => $parentid,));
		$lastcriteria->sortby('pagetitle','ASC');	
		$lastlijst = $modx->getCollection('modResource', $lastcriteria);
		foreach ($lastlijst as $lasteen){
			 $last=$last."<a href=\"".$modx->makeUrl($lasteen->get('id'))."\">".$lasteen->get('pagetitle')."</a> ";
		}
	}
	return $last;
}
?>

<?php
if ($categorie<>0){
	$currentResource = $modx->resource;
	$parentid=$currentResource->get('parent');
	if (isset($parentid)){
		$parentResource = $modx->getObject('modResource',array(
        'id' =>$parentid));
		if (isset($parentResource)){
			$secondparentid=$parentResource->get('parent');
			if (isset($secondparentid)){
				$secondparentResource = $modx->getObject('modResource',array(
				'id' =>$secondparentid));
				if (isset($secondparentResource)){
					$tv = $modx->getObject('modTemplateVar',array('name'=>'categorie'));
					if ($tv->renderOutput($parentResource->get('id'))<>0){
						$kinderenvan=$secondparentid;
						$first=$first.$secondparentResource->get('pagetitle').": ";;
					}
					else {$first=$first."Categorieën : ";$kinderenvan=3;}
				}
				else {$first=$first."Categorieën : ";$kinderenvan=3;}
			}
			else{$first=$first."Categorieën : ";$kinderenvan=3;}
		}
		else{$first=$first."Categorieën : ";$kinderenvan=3;}
	}
	else{$first=$first."Categorieën : ";$kinderenvan=3;}
}
else{$first=$first."Categorieën : ";$kinderenvan=3;}

$firstcriteria = $modx->newQuery('modResource');
$firstcriteria->where(array(
   'parent' => $kinderenvan,
));
$firstcriteria->sortby('pagetitle','ASC');
$firstlijst = $modx->getCollection('modResource', $firstcriteria);
foreach ($firstlijst as $firsteen){
	 $first=$first."<a href=\"".$modx->makeUrl($firsteen->get('id'))."\">".$firsteen->get('pagetitle')."</a> ";
}
return $first;
?>