Category Slug Problem

Heya all

I have been playing with my website recently and have decided to add a new section to it detailing alot of seperate products divded up by thier individual makes. For instance the setup is as follows:

main cat: Supplements
sub cat: AST
sub cat: BBA
sub cat: etc, etc

Now for each one i have added the slug as the name of the category but in lowercase and with – for spaces where applicable. The resulting URL is as follows:

http://mysite.com/supplements/ast/product-page.html

This is working fine HOWEVER on one of my categorys it will not work. The category maximuscle will not keep the correct slug. It keeps converting itself to maximuscle-supplements or maximuscle-supplements-2 etc etc. Of course it should just be maximuscle. Now im guessing this is some sort of duplication issue that is not allowing me to make that category however i need to get it fixed and am having real issues. I have dug around the database, looked in various files and cannot find anyway to fix this. Can anyone give me some pointers on a way to fix this?

PS: There is only one Maximuscle category, not multiple.

Please help! 🙂

Ludz~