yes google doesnt like it they look at it as a mirror site
i have to domains for my site .co.uk and .com when i did my sites i used the .co.uk domain as the main domain name
then i used the .com one to a page with a msg saying that our real website address is
www.domain.co.uk and thats it this way google will not look at it as a copy
i have seen lots of sites that have all didfferent kinds of domain names going to the same site and google dosnt like it so it works the same way yours works
having lots of pages the same