Site pages indexed 2 times

[varun8211]

I have a real good content site on herbal cures. (www.herbsandcures.com). It has been online for more than 1 yr now and google has indexed more than 1000 pages from this site.Now the problem is, it is still not being shown on top google results in very specific keywords too.. Has it been sandboxed?? I am saying this bcoz, there is a reason for that.. When the site started, my site's URLs are sth like :
http://www.herbsandcures.com/viewdis...?disease_id=11 for every disease (with different disease id offcourse)
and google had indexed most of such URLs becoz they were hard coded on the pages.
but after say 5 months, I implemented mod_rewrite and changed the URLs as:
http://www.herbsandcures.com/view-di...sclerosis.html

I created another PHP page and redirected it to "html" version..
Now, I have same content on 2 pages and google has indexed both of them..

Can this cause the problem and not showing my sites on google search engine?

Any advice will be appreciated..

Thanks a ton

[cyanide]

Now, I have same content on 2 pages and google has indexed both of them..

Can this cause the problem and not showing my sites on google search engine?

Yes, most likely that is your problem.
Doubtful it is a sandbox issue as you've been around for a year.