I write my articles through Windows Live Writer, and I publish them on my JoeUser blog. I have a registered Stardock.net account, so is that why all my articles are automatically posted on WinCustomize forums too?

Actually I registered with Stardock through WinCustomize somewhere in April. I read about JoeUser on WC, so I tried to make an account with the same username; but JoeUser told me that the username was unavailable. After seeing WC folk at JU, I followed my instinct and tried to login with my WC account. It accepted! That's when I figured out that my Stardock account can be used to login at all Stardock related websites , including WC and JU.

But does that also mean that all the articles and posts I publish on JU will automatically become available at WC too?  Can I stop that? Because some of the posts I'm planning to write aren't related with WC at all.