Random Mods- Members getting mod rights without my permission

Hi i run a Journey South forum www.journeysouth-forums.co.uk and as Admin over there i've had a strange occurance with Mods. I have 4 admins there and no mods, or so i thought! infact three members are mods and no ones made them one. I keep trying to change their rights and click save but its not doing anything. Can anyone help?

Do the members that have the unknown 'Mod" status have a personal user profile in the users and groups section in the admin panel? Check it in the Group Administration Section. If they have the personal user profile, just change their permissions or erase the personal profile.

That can sometimes be the problem with having too many Admins, changes are made without your knowledge or approval.

Check your statistics and see who is making changes. Because one cannot just magically become a mod. It is not possible. Somewhere someone has made a mistake with permissions, or you have someone who is giving rights that should not be.