If you are managing user group settings, and notice that some settings appear to be duplicated, there is an easy to use built in tool to fix this common occurrence.
Login to your admincp and select Tools > Maintenance > Remove Duplicates.
On the Remove Duplicates page, click “Check” to the right of User Group Settings.
After the remove duplicates check is done, you should see a success message.
The user group settings should now have all duplicate settings removed.