Removing Old App Data From iPhone?

[Jaw3000]

Recently during my Restore/Upgrade of my jailbroken iPhone 2G to OS 3.0, I noticed that settings for previously installed (but since deleted) apps were in my iPhone backup files (when examined via iPhone Backup Extractor). I became suspicous when I reinstalled a few apps I deleted months ago, and the settings/data was intact. I then deleted the local backups on my Mac and created a new one, which still contained these old settings. Unless there is another backup store on my Mac I'm unaware of, these old settings must be being retained and copied from somewhere on my iPhone, but I'm not sure where when browsing the file system via SSH. Again, the apps are not installed on the iPhone, but the settings seem to be.*Has anyone experienced a similar problem, or know how to get rid of this old data once and for all? I don't want to have it copied to my new iPhone 3GS. Thanks!