Hi,
Please follow these steps:
1. open Manage Extensions page in JoomSEF
2. open the parameters for extension the URLs are created by (if they are standard Joomla articles, open the Content extension parameters)
3. on the Extension tab set "Add categories to URL" to "No"
4. on the Common tab set "Add menu title to URL" to "No"
5. save changes
6. open Manage SEF URLs page in JoomSEF
7. delete old SEF URLs
8. on JoomSEF's Control Panel on the Maintenance tab click the Clear Cache button
9. clear any other caches you use - the cache in Joomla and caches of any 3rd party components
10. open the homepage of your website - the SEF URLs should be recreated correctly
If you are still having problems, I can offer you our paid support service to check the problem directly on your website. For pricing please see:
www.artio.net/e-shop/support-services/joomla-support-1h