Question on RLS page level security

[PSS]

While adding Page level security through RLS I can see some user who has only Viewer access , Yet they are able to access everything like contributor.

Following steps I have taken to adding RLS ( Page level security )

1. Created two groups

2. Added Page level security by using RLS 

3.Added permission based on groups 

4. Shared PBI Links with users 

Not able to find RCA, Kindly  help here 

Thanks in advance 🙂