penders - 8:53 pm on Jul 25, 2011 (gmt 0)

...no clue what are they

Presumably these do relate in some way to the pages on your site?

It looks like you might be accessing/linking to the same page with different query strings, which may or may not alter the content on the page? However, the page title remains constant. It looks like you need a rel="canonical" link referring to the base URL and thus removing the 'duplicate' pages?