when someone is in group admin and in group member, he doesnt get admin permissions. the group member overwrites all admin permisisons.
as the pictures show member has a weight of 10 and admin of 100, admin is also primary group. (removing the player from member enables the admin permissions again)

That's not the case - any permissions in admin will override the same nodes also set in other groups.

However, wildcards will not override non-wildcard permissions in lower groups - that's just the nature of the way the system works.

I suggest using the verbose command to see where things are going wrong, then adjust your permissions setup accordingly.