in fact security asssist authenticate user is not case sensitive, i can login with different user with lower case,( why is not case sensitive)
(2)actually i can login in different website and different database with same user name i use for testing.
(3) i try to register new one with same userEmail, it tell me it's already exsit
i try to thinks verything possible just no luck, this is just very odd
(4) and then i try to create new login page without security assist wizard when i login with same userEmail still no luck, but different one just fine.
Please help me jason, i really have no clue.