default session limit per role not working

Hi,
I installed the module, and the module work in drupal 7.
with Attention about the 2 bugs:
1. when I add a new role and create new user with that role the default session limit is 1.
why?
explain:
i have roles: admin, role 1, role 2, role 3.
admin session limit = default. ( work perfect )
role1 session limit = 1. ( work perfect )
role2 session limit = default. ( not working well because I can access just 1 time ), even If I choose session limit = 50 ( for example ), its not working well, all the roles get session limit = 1.

2. when I add user to same role I dont get the same session limit of another user with the same role.
example:
add user1 - role1, - session limit = 5.
add user2 - role1, - session limit = default. - not working ( this user get just 1 session limit )
Why?, whats wrong?
Thanks a lot.

Thanks.