User Access Review: Eliminate "multiple roles"

Hi

We have the following technical Roles:

Role1: permission A B

Role 2: permission A B C

Within the business role we have assigned Role 2 to the Business Role XY. So permissions A, B and C are authorized by the business role. 

However if we perform a user access review with "Review only items that have not been authorized by a business role" the Role1 is displayed with "not authorized". Can this be suppressed somehow? On permission level the authorisation is existing. 

Thanks!

Fabian

BTW: Are there any training videos / documents for IG? I got some basics from the vendor and the documentation is not bad, but some good practices would be great.