No Tab For User Groups In Administrator Accounts?

Hi, I'm trying to make administrator accounts for my new development team but limit their privileges so I made new admin accounts for them but after I created the accounts there doesn't seem to be a 'User group' tab that I can use to add them into the 'Development' User group I made.

Why is that, and how do I solve this?

You have to be logged in as the "root" admin to manage admin usergroups. Check your cscart_users table for the account that has the "is_root" column set to 'Y'. You can have more than one but there's an older defect (not sure if it was ever fixed) that can cause problems when more than one is_root=Y is specified.