Add-On domains and Subdomains

Hey guys,
The main domain for my cpanel account is vbseo.com (example) and I have a few add-on domains under it. I noticed that the search engines index the add-ons as a subdomain for vbseo.com.

For example: http://othersite.vbseo.com/forums/ instead of http://othersite.com/forums or http://www.othersite.com/forums

Do you know how you can have all the add-on domains to be indexed with their own full URL and not as a subdomain for vbseo.com (main domain)? Need each domains to be indexed as www.othersite.com and not have vbseo.com in the URL.

Hopefully there is a way to do this in VBSEO because my webhost administrator says she does not know how to do it. Thank you in advance.

You shall 301 redirect addon domains to your main domain. You can find how to @ 301 Redirecting Domains