Domain mapping and site map question

Hi. I have a question. Should my site map for a mapped domain be showing the mapped domain or the subdomain.?

i.e. my mapped domain name is fastpowersports.co.za but this is the site map that is being generated:
* localbizonline.co.za/fastpowersports/sitemap-misc.xml
But should it not be:
* fastpowersports.co.za/sitemap-misc.xml

I was under the impression the site map should reflect the mapped domain NOT the subdomain.

Thanks
Jeremy