SwitchTemplate: Works, but doesn't play nice with 'GetExtUsers' snippet

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
[[$METATagChunk]]
<title>[[*longtitle]]</title>
<base href="[[++base_url]]" />
[[!JS_CSS_to_HEAD]]
</head>
<body>
[[*content]]
<div class="closeWindow">
<form>
<input class="btn-CSS" type="button" value="Close Window" onClick="window.close()">
</form>
</div>
</body>
</html>

<?php
/**
 * GetExtUsers snippet for ClassExtender extra
 *
 * Copyright 2012-2014 by Bob Ray <http://bobsguides.com>
 * Created on 01-05-2014
 *
 * Customized by Karl Forsyth, 9/16/15
 * 
 * ClassExtender is free software; you can redistribute it and/or modify it under the
 * terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * ClassExtender is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * ClassExtender; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * @package classextender
 */

/**
 * Description
 * -----------
 * Show user information
 *
 * Variables
 * ---------
 *
 * @var $modx modX
 * @var $scriptProperties array
 *
 * @package classextender
 **/

/* The extendeduser package should be pre-loaded
   due to being registered in the extension_packages
   System Setting */

$modx->lexicon->load('classextender:default');


/* @var $scriptProperties array */
$scriptProperties = isset($scriptProperties)
    ? $scriptProperties
    : array();
$sp = $scriptProperties;

$userClass = $modx->getOption('userDataClass', $sp, 'userData');

$where = $modx->getOption('where', $sp, array());

$where = !empty($where)
    ? $modx->fromJSON($where)
    : array();

/** START added by Karl */
$listGroupId = 0;
foreach($where as $key => $element) {
    $keyName = 'UserGroupMembers.user_group';
    $pos = strpos($key, $keyName);
    if($pos !== false) {
        $listGroupId = $element;
        //$modx->log(modX::LOG_LEVEL_ERROR, '[GetExtUsersCustom] ' . $key . $element);
        break;
    }
}
$userGroupObj = $modx->GetObject('modUserGroup', array ('id'=>$element) );
$userGroupName = $userGroupObj->get('name');
//$modx->log(modX::LOG_LEVEL_ERROR, '[GetExtUsersCustom] Group name: ' . $userGroupName);
$modx->toPlaceholder('groupName',$userGroupName,'');

date_default_timezone_set("America/Los_Angeles");
$datePrinted = date("m/d/Y, g:i a");
$modx->toPlaceholder('datePrinted',$datePrinted,'');
/** END added by Karl */

$outerTpl = $modx->getOption('extUserOuterTpl', $sp, 'extUserOuterTpl');
$innerTpl = $modx->getOption('extUserInnerTpl', $sp, 'extUserInnerTpl');
$rowTpl = $modx->getOption('extUserRowTpl', $sp, 'extUserRowTpl');
$sortBy = $modx->getOption('sortby', $sp, 'username');
$sortDir = $modx->getOption('sortdir', $sp, 'ASC');

//$c = $modx->newQuery($userClass);

/** START added by Karl */
$c = $modx->newQuery('modUser');
$c->innerJoin('modUserProfile', 'Profile');
$c->innerJoin('modUserGroupMember', 'UserGroupMembers');
$c->innerJoin('userData', 'UD', 'UD.userdata_id = modUser.id');
$c->select($modx->getSelectColumns('modUser', 'modUser', '', array('id', 'username')));
$c->select($modx->getSelectColumns('userData', 'UD', 'data_'));
$c->select($modx->getSelectColumns('modUserProfile', 'Profile', 'profile_',
    array('id', 'internalKey', 'fullname', 'email', 'extended')));
$c->select($modx->getSelectColumns('modUserGroupMember', 'UserGroupMembers', 'group_',
    array('id', 'user_group', 'member')));
/** END added by Karl */

$c->sortby($sortBy, $sortDir);
$c->where($where);

//$users = $modx->getCollectionGraph($userClass, '{"Profile":{},"User":{}}', $c);

/** START added by Karl */
$users = $modx->getCollection('modUser', $c);
/** END added by Karl */

$count = count($users);

//$modx->log(modX::LOG_LEVEL_ERROR, '[GetExtUsersCustom] count = ' . $count);

if (!$count) {
    return $modx->lexicon('ce.no_users_found');

}

/* @var $user modUser */
$i = 0;
$outer = $modx->getChunk($outerTpl);

$output = '';
$innerOutput = '';
foreach ($users as $user) {
    $fields = $user->toArray();
    unset($fields['password'], $fields['cachepwd'], $fields['salt'], $fields['hash_class']);
    /*
    if ($user->Profile) {
        $fields = array_merge($user->Profile->toArray(), $fields);
    }
    if ($user->User) {
        $fields = array_merge($user->User->toArray(), $fields);
    }
    */
    
    $inner = $modx->getChunk($innerTpl, $fields);
    $row = $modx->getChunk($rowTpl, $fields);
    $innerOutput .= str_replace('[[+extUserRow]]', $row, $inner);
    $i++;
}

$output = str_replace('[[+extUserInner]]', $innerOutput, $outer);

return $output;

[[!GetExtUsersCustom?
    &sortby=`lastName`
    &sortDir=`ASC`
    &extUserOuterTpl=`ExtUserOuterTplCustom`
    &extUserInnerTpl=`ExtUserInnerTplCustom` 
    &extUserRowTpl=`ExtUserRowTplCustom`
    &where=`{"UserGroupMembers.user_group:=":"6"}`
]]

//$c = $modx->newQuery($userClass);

$modx->log(modX::LOG_LEVEL_ERROR, '[GetExtUsersCustom] count = ' . $count);

[2015-09-19 20:19:20] (ERROR @ /index-dev.php) [GetExtUsersCustom] count = 4
[2015-09-19 20:19:42] (ERROR @ /index-dev.php) [GetExtUsersCustom] count = 4

<ul>
[[PeopleGroups? &user=`[[+id]]` &limit=`0`]]
</ul>