Supplemental result (non-www) replaced my www listing?

[irock]

Hi, I was wondering if you guys konw what's going on. My non-www listing has replaced my www listing. It's just one page that is having this problem. Also, the non-www even has turned into a 'supplemental result'.

My questions are:
1. Will this problem spread to other pages?
2. Should I contact Google regarding the removal of the www listing page?

I already have 301 redirect from non-www to www. But I don't have absolute link. I rely on BASE HREF.

Thanks much!