Using:
Domain Access 6.x-2.12
XML sitemap 6.x-2.0-beta3
XML sitemap domain 6.x-1.x-dev (latest)

Site Example:
au.greymouseglobal.com
nz.greymouseglobal.com

The sitemaps.xml contain the correctly published content, eg NZ contains NZ posts.
However the base URL when running cron and rebuilding all of the sitemaps get updated to the domain name the cron was run from, not the base url for each domain.

If I manually correct the files it works as expected so I think its happening during the generation section of the xml sitemap.

Please help.