Moderators i know this post is like another of mine i have just tried to explain in more detail and is not intenional spam many thanks.
Sorry if this is mind boggling.
i cant get around wp changing my slugs when there is another in the table.
Explanation
1 i want to have xxxx.com/tag/acne and create a category just as xxxx.com/acne.
The problem at the moment is tags and catagorys are stored in the same table prefix terms.
This means if i have a tag already called acne and i try to insert a category called acne wp auto changes the url.
I hope you can understand what i mean and what im trying to achieve.