Google Webmaster Tools & Duplicate Titles

I'm having a problem where Google Webmaster Tools is considering two links that I have for every page as different pages, thus it reports that I have duplicate titles, when in fact they are the same page, one just passes tracking parameters:

‎/path/to/file/
‎‎/path/to/file/?source=val1&interest=val2

What am I doing wrong? Is this the incorrect way to handle this? My reason for the tracking parameters is that I want to track when traffic comes from certain links.

At one point several weeks ago I had something in my robots.txt file that disallowed robots to index anything with parameters. I have since removed this but google hasn't updated yet to reflect this change. Could this some how be related?

Thanks!
Ryan

if your site generating the same page with two different URLs so google will treat it as two pages with the same content

I would advise waiting a bit longer. Have you checked Google's cache yet? Were your pages been indexed any time after you made the change to robots.txt?

You needed to use the "remove url" feature in Google Webmaster's Central after you updated your robots.txt, simply navigate to that tool and remove the URLs. Within 24 to 48 hours they should be removed from the index.