What is the purpose of the cmsmanagergroup structure

[mbjorkman]

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 INSERT_UPDATE UserGroup;UID[unique=true];groups(uid)[mode=append];locname[lang=en]
 ;basecmsmanagergroup;employeegroup;Base CMS Manager Group
 ;cmsmanagergroup;employeegroup;CMS Manager Group
 
 INSERT_UPDATE PrincipalGroupRelation;source(uid)[unique=true];target(uid)[unique=true]
 ;cmsmanagergroup;basecmsmanagergroup
 
 INSERT_UPDATE Employee;UID[unique=true];groups(uid)[mode=append];sessionLanguage(isocode);
 ;cmsmanager;cmsmanagergroup;en;
 

Is there a reason for putting 1. cmsmanagergroup into employeegroup 2. basecmsmanagergroup into employeegroup 3. cmsmanagergroup into basecmsmanagergroup

Instead of just having the employeegroup on the basecmsmanagergroup?

We are a bit confused about this since there are issues with type permissions in the inheritance tree when a group appears on multiple levels.