First of all: my apologies to all who may have been misled by my posts in this topic.
The founding admin is automatically members of Registered Users, Administrators and
My confusion was due to my principle of being the one and only admin, giving myself Full Access admin permissions, and removing myself from Global Moderators (since these permissions were covered by Full admin access anyway) (this also reduces potential conflicts in permissions settings).
My thanks to Lumpy Burgertushie, stevemaury
for correcting me in this topic (and the extra info per PM).
I don't consider myself an expert on phpBB features but I've been using it since early 2003 and it seems I unwillingly got into a state of blindly taking for granted that my setup of Admin permissions (which suits my pupose 100%) is the default, a mistake I promise not to make anymore (promises can be unknowingly broken though
I've now got an new board on localhost (default setup) for reference.