Confirmation is not strictly a function of the account if the member applies to a group via email. They still have to confirm in that case, even if they already have an account.
NC is strictly a function of the account. It's only needed once per account, regardless of the number of groups joined. After confirming your email address this way, you do still need to verify that you want to join a group if you apply via email, but the pending/accepted member will not be NC.
