You need to redirect the www version of your website URL to non www one, use .htaccess 301 redirection and to know more just Google url canalization However, your www version PR is 2 and the non www PR is 4
Don't panic because there are tools that are not accurate it was pretty normal. If you are doubting your PR, better check on Google's tool that is more accurate than any SEO tools or I recommend you SEO Open from firefox.
sometimes it's really confusing about PR right? I got PR2 even though my blog is 2 weeks old...it drop to PR0 after a while ..
Hi Friend, Google tool bar is the best way to check PR and you are updating your site so soon when search engine comes on your site then search engine finds new things or some spam.