Hello, This month i realize that same websites with different domains (for example http://www.gardasoft.com/ and http://www.gardasoft.co.uk/) have problems with ranking. I found the same problem 2 weeks ago with another websites that one domain is main and other is forwarded. We used to have results for both in top 10 . We used to have 33 listings on page one for main and 12 listings in top 10 for forwarded domain. But now the 2nd one drop from anywhere? Does anybody have the same problem ?
I had the same problem before. You could use use .htaccess to use the preffered domain. I'm not sure how your SEO. You can also setup a script that points to the same page on the opposite domain. Ex. aaaa.com/links <---> bbbb.com/links If they both link to each other it will help.