When editing a person (Person content type which has the User field enabled) the username / password / groups field is always shown, also when the "Enable login" is unchecked.
The username / password / groups fields should be displayed only when "Enable login" is checked.
Cannot test, is giving an error (see attachment): http://www.<knowncustomername>-integrated.cluster38.e-active.nl/app_dev.php/admin/content/661530df1faf32b8b65519a6eaaf8cd2?lock=33c7550a-fd70-11e5-a0b0-089e013951df
Test NOK, back In progress, can you assign it?