Explaining Permissions Mac OS X 10.11.5 / ReadyNAS OS 6.5.0 / AFP - First Question

Recently transitioned from a ~2008 vintage 2TB NV+ to an new 9TB 314.  It was saying goodbye to a rock solid old friend, but I have to say I'm loving the new 314 and the new OS.  A big step forward - the ReadyNAS tradition of excellence continues.

But I remain very confused about permissions.  I lived with it on the old NV+ but I want to get it "right" this time.

This related to accessing the 314 running OS6.5 via AFP from OS X 10.11.5 (latest El Capitan updates in place).

This all for the user "admin" in ReadyNAS OS 6.5.  I'm logging into via AFP using the user "admin"

User "admin"'s primary group in FrontView is "admin" (UID=98) and its secondary group is "users"

Here's what I see via SSH - also logged in via the user admin

Here's what I see in the Finder, logged in via the user admin via AFP

Can someone please explain the differences between these two views...

(1) why is the owner of these files in the Finder "(unknown)"?  I was expecting "admin"

(2) why is the group of the files "staff"?  I was expecting there to be no group permissions for a home share

(3) why is the permissions the files of "staff" and "everyone" read only?  I was expecting the "admin's home" share permission (no group and no everyone access - as shown in both SSH and Finder screen shots above) to be inherited at the file level

(4) how could I change the default user permissions of files created in a home permission?  Unlike other shares the FrontView "Access" settings for "home folders" doesn't allow any changes other than selecting the "Network Protocol"  (other shares I can set the "Network Access" (share) and "File Access" default permissions)

Thanks for everyone's help