How nested group works

Hello

Please help me to understand what i'm doing wrong here:

Four groups: MA, GBM, EBU Users, EBU Editors

MA users can see only MA categories
GBM users can see only GBM categories
EBU Users can see all categories
EBU Editors can see and edit all categories

Nested groups:
EBU Editors is added as nested group for EBU Users
EBU Users is added as nested group to MA and GBM

My problem:

Log in as MA or GBM i can see only MA respective GBM categories

Log in as EBU Users or EBU Editors i can see MA and GBM categories and blocks...twice? See attached image

I use Flexicontent 1.5.2 and Flexiaccess 1.0.3

Thank you

Anyone, please? I still have this problem

Ok, i found if i remove EBU Users nested group for GBM group, i can see links only once for this category

Still facing this problem. Ebu Users should see GBM and MA pages. How can i do that without having duplicate links?

Come on, guys, some help here, please! Give me a link to documentation, a hint, something!

The group structure should be the following
MA - Nested group: EBU - Level 2
GBM - Nested group: EBU - Level 2
EBU Users - Nested group: EBU editors - Level 3
EBU editors - Nested groups: none - Level 4

Then you grant the permission required to each group and it should work properly

Cheers,
Emmanuel.