## Current Line in googlesitemaps/code/GoogleSitemap.php
$this->Pages = Versioned::get_by_stage('SiteTree', 'Live');

## Should Probably be like this

$subsite = $this->CurrentSubsite();
if ($subsite) {
  $this->Pages = Versioned::get_by_stage('SiteTree', 'Live','`SiteTree_Live`.SubsiteID = '.$subsite->ID);
} else {
  $this->Pages = Versioned::get_by_stage('SiteTree', 'Live','`SiteTree_Live`.SubsiteID = 0');
}


## For Loop Change approx around line 45
		foreach($this->Pages as $page) {
			// Only include pages from this host and pages which are not an instance of ErrorPage
			if(parse_url($page->AbsoluteLink(), PHP_URL_HOST) == $_SERVER['HTTP_HOST'] && !($page instanceof ErrorPage)) {

## Change to
foreach($this->Pages as $page) {
			// Only include pages from this host and pages which are not an instance of ErrorPage
			if(!($page instanceof ErrorPage)) {