Sitebuilder name in results-spammers thru a backdoor?

Sitebuilder in search results-block "backdoor"

[KaraScene1]

Great site! Learned to make a robots/ htaccess file here but tech support had to upload it (don't have access to the head of my page) PROBLEM: Noticed in search results my site was showing up sometimes as "myregisteredsite.user1234" (my sitebuilder) instead of the domain name -though it's still found under the domain name as is the product catalog. The website tech didn't know why. THEN my US visits dropped 80%-I saw mainly visits from .ru and blocked the country IP range and specific.ru IP's w/ the.htaccess file.Blocked all spiders/bots with robots.txt EXCEPT a few major search engines.I read spammers come through a backdoor? WHERE? HOW? I don't want people to register for a password and I'm not at a level of "rewriting" files,etc. Google's url removal tool says it takes down the url and ALL VERSIONS. Do I want to remove the "myregisteredsiteuser" url and re-upload my domain name url (which still shows up)? I'd still be able to get into my sitebulider online-it would just take it out of search,right? How do I find & block this backdoor? Thanks for ANY help!

[keyplyr]

I'd get a different host if "The website tech didn't know why" and if you don't have ftp access. This is a must.

Just don't promote your site as "myregisteredsite.user1234". All shared hosting companies keep track of their customer's accounts in similar ways. The domain name is how your visitors will find you. Only use your domain address when you link to your site.

Why would Google have your site listed as "myregisteredsiteuser" unless there are links pointing to your site using this URL?

I would probably not remove "myregisteredsiteuser" from Google. If there are links using "myregisteredsiteuser" to point to your site, Google will keep indexing them. See if you can repair these incoming links yourself first. Do a search for "myregisteredsiteuser" and go to every web site that is using this URL and ask for them to change it to your-domain.com (example.) Ask your host if they list your site as "myregisteredsiteuser" anywhere. Many hosts have a directory. Google is getting this address from somewhere.

Then open a Google Webmaster Tools account and in the Site Configuration > Settings you can tell Google how you want the URL to your site listed.

With shared hosting services there is a greater chance of hackers gaining access. I wouldn't worry about it. Just report it to your hosting company if you detect anything suspicious. If they don't fix it quickly, as I said, I would get another host.

But you absolutely need ftp access to upload your files. You also need access to your raw server logs. If your shared hosting company does not supply these two basic things, get another host.

[KaraScene1]

Thanks Keyplyr, I'll definately try all that. Now I see someone else on here posted the same problem->
[webmasterworld.com...]

[g1smd]

A simple non-canonical domain redirect using a two-line RewriteCond-RewriteRule set should fix it.

RewriteCond %{HTTP_HOST} !^(www\.example\.com)?$
RewriteRule (.*) http://www.example.com/$1 [R=301,L]

[Pfui]

...Presuming the OP's allowed to use FTP, and gets direct access to their own .htaccess (and, ideally, access and error logs), and that their ISP's installed mod_rewrite...