the subsite having different access rights than the parent

Hi,

 

I am relatively new to SP2013 and have been put i charge of creating a new department site at work. So now I am a site collection owner.

I have set up our site collection like this:

 

Parent site: (Holds no content is merely a site to control the subsites)

- subsite Management - holds all related to managing the department like MoMs of management meetings, performance reviews, strategy initiatives not yet ready for release

- subsite Department  - holds all department relavant information like holiday plans, vision mision stuff etc

- subsite 'functional area' all related to templates and tools that our function needs and that stakeholders need to interact with

 

I then have  my usergroups:

A. site owners: (me) permission: full controll

B. managers (the management group) : permission: Edit

C. HR partners (the HR partners for our department): permission: contribute

D. All (anyone employed in the department): permission: Contribute

E. Visitors (stakeholders - like suppliers, consultants, other departments etc) : permission: Read

 

This is the result i wish:

parent site: All groups have access 

subsite Management: only accessible by groups A, B, C 

 

I broke the inheritance from the parent site. I am confident i set up the right levels of control. But all groups are still listed on all sub sites and when remove them they disappear from all sites even the parent. Could you step-by-step guide me to the result i wish?

 

Best wishes,

Mai