Usergroups

I have made these groups and each group has its own permissions. Yesterday i have changed the names of all the groups and the permissions were still the same but now whenever I add someone to the group they still cant get in. So i have to go to the admin panel user admin and I have to put them in manually. It worked before I changed the names. Does anyone know what the problem could be?

i think u might not have pressed have save after chnaging the permissions clik on save to make it work