Google Listing Site Under Multiple Domains

[richmar]

Our client site has always used one domain name, yet Google (since mid-April) has been listing the site under various other domains that we do own, but neve use for the promotion of the site.

One day Google lists the site with the correct domain. The next 3 days, it lists it by a different domain. It's as if Google is rotating databases. The worst part of all is that Omniture sees these other domains as referrers, instead of showing Google as the referrer. Thus, my SEO traffic numbers are incorrect by thousands of referrers.

How can I correct this problem? Or anyone know what is happening?

[Lorel]

are they all on shared hosting and have the same IP address? that may be the reason as I have see Google switch things around between domains on the same IP.