SEO Search Terms Tagging Plugin - Duplicate Title Tag Issue

I have been using SEO Search Terms Tagging plugin for some time now. And being a n00b with SEO, I recently discovered that Google Webmaster tool is reflecting over 10,000 duplicate title tags! All these are in "/search/<created by stt>" format :O

I have read that duplicate title tags causes heck lot of problems in indexing. Can someone please help me in this regard? How do i avoid this problem?

Thanks