The permissions of the group administrator are not taken into account

Problem 1

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I have set the permissions of the administrator like this :
Leave group (Unchecked)

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To replace the default drop-down button, I created group views.
- a view for "Join the group". "Access: Group Permission | Join the group: Join group"
- a view for "Exit group". "Access: Group Permission | Join the group: Leave group"
- a view for "Create content". "Access: Group Permission | Administer the group"

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When I am not a member of the group, the block of my "Join group" view is displayed and the others are not displayed.
When I am a member of the group, the block of my "Leave group" view is displayed and the others are not displayed.

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When I am an administrator of a group, all views are displayed. Why ? The permissions of my views are correctly set.

Problem 2

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All permissions "Relationship" are unchecked

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The administrator of the group always has access to "Related entities". Why ?
What is the purpose of this tab? There is already a "Content" and "Member" view.