Files that the Samba server itself displays as:
drwxrwxr-x  3 username staff  4096 Apr 16 11:06 Example Cases

Using KIO smb://user:pass@server in Dolphin, and displaying the Permissions, User, Group columns, 
display in Dolphin as drwxr-xr-x, owned by user 'username' and group 'username'

Reproducible: Always

Steps to Reproduce:
1. Use KIO smb://user:pass@server to browse remote file share
2. See incorrect permissions and attempt to fix them
3. Fix doesn't do anything because they weren't wrong to begin with as the group is being incorrectly reported
Actual Results:  
Group is wrong and perms are also wrong due to that

Expected Results:  
Group should be reported correctly and perms as well

Possibly related bug which I just filed,
https://bugs.kde.org/show_bug.cgi?id=302595


smb.conf on remote server:

[global]
workgroup = OFFICE
server string = CIFS00.OFFICE File Share
server string = %h server
unix extensions = No
follow symlinks = Yes
wide links = Yes
locking = yes
strict locking = no
security = user
encrypt passwords = true
passdb backend = ldapsam:"ldaps://10.10.10.220:63 ldaps://10.10.10.119:636" 
ldap ssl = off
ldap admin dn = uid=rootuser,dc=network,dc=net
ldap suffix = dc=network, dc=net
ldap group suffix = ou=Group
ldap user suffix = ou=People
ldap machine suffix = ou=Computers
ldap idmap suffix = ou=People
obey pam restrictions = yes
unix password sync = yes

[public] comment = X Drive
path = /space/public
public = yes
writable = yes
printable = no
create mask = 0775
create mask = 0664
create mode = 0664
directory mask = 0775
force directory mode = 0775
directory security mask = 0775
group = staff
force group = staff