Domain Mapping vs Theme Preview problem

I seem to have domain mapping working correctly, atleast from a reseller account I use for domain registration, although I have not been able to get any domains from godaddy to work. not sure why.

but my main problem at the moment is for the ones I do have working, no matter what setting I choose under super admin > settings > domain mapping - "domain entered by the user", "mapped domain", or "original domain" the preview link under Appearance > Themes resorts to the current theme being used on the account. and that happens either way, logged in as super admin or as the user.

any suggestions?

Thanks.
Tony V