IBMan,
Sabat's server uses Apache. Apache has what is called a "DirectoryIndex" directive in its configuration files. Under this directive, there are file names of all the files that Apache will load in place of a directory index (a directory index is the plain white page with a listing of all the files and directories within your current directory).
Since
http://www.shlomitoltchik.com/ is a directory of shlomito/public_html/, it too must either use a directory index, or have a directoryindex file replacing it. In this case, it appears to be index.php.
http://www.shlomitoltchik.com/ and
http://www.shlomitoltchik.com and
http://www.shlomitoltchik.com/index.php are the exact same file (index.php).
What Sabat and his host might be talking about is a rewrite engine (generally shared hosts won't install server-side modifications on request). For Apache, this is usually a modification called "mod_rewrite". Here's a great intro to how it works:
http://www.yourhtmlsource.com/sitemanagement/urlrewriting.html
It seems strange that a host would be running Apache without mod_rewrite (it's a very useful mod).
A simple solution here to avoid apparent duplicate content is to force all URLs to use the full URL of the page.
For instance, when
http://www.shlomitoltchik.com/ or
http://www.shlomitoltchik.com is visited,
http://www.shlomitoltchik.com/index.php appears in the address bar. To a search engine, it will never find or display the other URLs, so it won't confuse them as duplicate content.
You can probably find another fix somewhere to solve this problem, but in the future when your URLs get more complex, you will find mod_rewrite to probably be a requirement if you want to keep your up with SEO.
I don't know if this will completely solve the problem of duplicate content, but you could try moving your homepage to another file (like 0.php). Then make index.php with the following code in it:
Code:
<?
Header( "HTTP/1.1 301 Moved Permanently" );
Header( "Location: [url]http://www.shlomitoltchik.com/0.php[/url]" );
?>
When you are done, test it with this link:
http://www.webconfs.com/redirect-check.php
It will check to see if it works smoothly and is friendly for search engines.
Hope this helps.