An user can view info of another users

I updated Codeigniter to version 3.0.0 and the issue persist. I configured sessions in database but the trouble don't disapear

Code:

$config['sess_driver'] = 'database';
$config['sess_cookie_name'] = 'ci_sessions';
$config['sess_expiration'] = 7200;
$config['sess_save_path'] = 'ci_sessions';
$config['sess_match_ip'] = TRUE;
$config['sess_time_to_update'] = 300;
$config['sess_regenerate_destroy'] = FALSE;

What could I do? Locally in my computer I ran the app and works perfectly, but when I navigate mi app over Internet, sessions overlaped between users... I'm desperate! 

Note: In my ci_sessions table I can see this



This sessions were created from my user in only 5 minutes, is this normal?