[Plugin: Google XML Sitemaps] Subdomain indexed and error reported by Google Webmaster

Hello,

I am having an error from Google Webmasters Tools.

I have created depositos.comparativadebancos.com and hipotecas.comparativadebancos.com and they are directly added to my sitemap by the plugin, and the Google Tool says me that they are not allowed. I guess because it is not the original domain, https://www.comparativadebancos.com

do you know how to avoid that the plugin automatically add these subdomains???

thanks