I think what has happened is that you typed the website address as http://www.shopweightlossproducts.com rather than without the www.
If you are manually submitting to engines/directories then you should use the url without the www. if that is the main url of your site.
I do however disagree with Geocities that this is a major, major. Also, because of canonical url redirection, as mentioned below, this shouldn't be a problem.
A page on any website, WordPress or not, can be accessed by multiple urls. For example, you can typically visit the home page of a WordPress web site by all of the following urls:
•http://example.com/
•http://www.example.com/
•http://example.com/index.php
•http://www.example.com/index.php
The problem with allowing all of these ways to access a single page is that it can potentially hurt your website’s overall search engine optimization (SEO). Having multiple urls for a page means that search engines could index duplicate copies. So WordPress fixes this problem by employing automatic redirects known as Canonical URL Redirection, which only enables one url per page.
There is more on Canonical URL redirection for anyone interested in reading about it in depth, here http://markjaquith.wordpress.c…..ical-urls/