You mentioned user and group ID number, hmm..
In my case on OMV I see:
uid=1002(emby) gid=100(users) groups=100(users)
and on emby server:
id emby
uid=998(emby) gid=998(emby) groups=998(emby),0(root),44(video),107(render),1000(yuriw)
So then are not equal ...