Can an Inbound Link Create Supplementals?

[cz]

I did a "site:mydomain" on Google. Big Daddy had 12 of my pages as supplemental. During the most recent shakeups they are still there.

I'm on a large platform and have a "storename" or account - but a vanity domain set to redirect anything on my site to the vanity name. This has always worked and still does "to the eye".

But, somehow Google found it's way to 12 pages with www,mydomain.com/mydefaultstoreaccountname - including my index page which might fracture the PR of the site - they are supplementals but have been there for months now.

I emailed a programmer we know with more SEO knowledge than myself. I asked how can we patch this so Google can't find that storename part? He told me that a site or directory using that info to write the IBL could cause Google to list these pages as such.

I never heard of that? What do you think? Thanks!

[incrediblehelp]

Maybe, if it was from a website you owned (controlled) that had the exact same duplicate content on it as the one that is now in the supplemental.

[cz]

Thanks for your take on this Jaan! I tried to post back several times this weekend, but only now have got through to the forum. It was MIA!