Rewrite Help

I'm having a perplexing problem with a rewrite rule (it's off topic but it's Friday!). My initial path is piccDetails/index/0/linetypes/2012-01-01/2012-12-31/Successful and that works great. However, in my script I want to change the zero in the path to a 1. This tells it to generate a spreadsheet. When my new link is clicked on I wind up with piccDetails/index/0/linetypes/2012-01-01/2012-12-31/Successful/piccDetails/index/1/linetypes/2012-01-01/2012-12-31/Successful. Each click just adds to the end of the URL instead of replacing it. My .htaccess file looks like this: RewriteEngine On RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^(.*)$ index.php?url=$1 [PT,L] I'm guessing there's something wrong in it but I don't know what. Any help would be appreciated. Thanks! Floyd