Do Homegroup Access Rights OVERRIDE Workgroup?

Trying to share folders with specific users of multiple machines with full R/W access but share them with others as only Read. Ex. MOM, DAD Full access, KID1, KID2 Read only.

I have this up an working between the two machines (with Homegroup turned off) and am happy with it. I have specifically granted access to the folders in question to MOM & DAD. I planned to then turn on Homegroup and manage all other sharing there through sharing "Libraries".

As soon as I created and joined Homegroup, it appears to have revoked MOM & DAD access to that folder.

Does the homegroup overide the workgroup sharing levels? If anyone can shed light on this I'd appreciate it. I like the simplicity of Libraries and Homegroup the more I use it. It's pretty clean and simple IMO.

I've been re-producing the issue for the last hour or so and this is what I've found:

When homegroup is created (on Tower PC) - No Problem
When laptop joins homegroup - Access to Tower is overridden
Windows Credential changes to: Username: \\Tower\HomeGroupUser$

Once this happens, it seems to stay in force even when the individual acounts leave the homegroup. The only way I found to correct it is to completely end the homegroup on all machines. Then, my Workgroup access seems to be back, usually takes a re-login from the laptop to the Tower.

I know of the place in Advanced Sharing to "Allow Win to manage homegroup connections" vs "Use user acct and pw to connect". I'm hesitatnt to do this just becasue I WANT to use Homegroup/Library sharing for vast majority of families sharing. I was just trying to manage some exceptions, like not risk the kids destroying the Family data storage or keeping some special directories strictly limited to MOM & DAD.

Homegroup seems like an all or nothing tool. Sure hope this is not the case. Please advise if anyone has ideas what would fix this. Thanks all.