macOS Mojave with server 5.7.1file sharing Group permissions problem :-(

hi

i have macOS Mojave with server 5.7.1 on Mac pro(Late 2013).

I'm running an updated server for the latest version.

To my question I did not find an answer through Google ...

I do several tests before moving the server to work.

The test on the server is performed from several computers, mainly from operating system 10.12.

I set up 3 users (A + B + C) and 2 groups (E + F) to check permissions Unfortunately permissions do not work properly.

And there seems to be a problem with the ACL and the permissions do not pass automatically.

The entrance was examined in two situations: AFP + SMB.

for example:

When User A logs on to the server and builds a folder / file, checking permissions on the file from the server is saved to User A and not to the Group Name (Group E).

Group: wheel - Permission: read only

All: everyone - permission: read only.

When user B enters the server and builds a folder / file, checking permissions on the file from the server is saved to user name B and not to the group name (group E).

Group: wheel - Permission: read only

All: everyone - permission: read only.

Arrange permissions through: System Prepernces / File Sharing and manual permissions changes: Apple Premissions to Enclosed Items.

Everything works out ... until the next user change.

I would be happy for help an experienced server user

Best regards

Benny