Automatically append numbers from to avoid duplication not checked, but appends 3 to new accounts

Automatically append numbers from to avoid duplication not checked, but appends 3 to new accounts

The setting "Automatically append numbers from to avoid duplication" is not checked, however the last several users created using this Mailbox enable user template has appended a "3" to each of the new users mailbox account.  The account works, but the user (nor the admins) knew that the mailbox name had a 3 appended to the exchange account until we discovered the problem.  If the setting is not enable, is there another setting causing it?  anyone else had this issue?