1. Does, a new role contain ‘delete_users’ capability? User Role Editor Pro does not apply restrictions to the superadmin users. It uses WordPress built-in is_super_admin() function to check this. WP checks ‘delete_users’ capability to define if not multisite WP user is super admin or not.

2. You may send a copy of wp-lister plugin to support [at-sign] role-editor.com
I will test and make suggestion on the issue.