This thread is ridiculous, lets end it now.
The first reply from Jobe to your question told you WHY this is happening, yet you see more interest in arguing so let me make it even more simple.
# RestrictOperNick [OPTIONAL]
# Forbids the registration of nicks that contain nick with services
# access. So if Tester is a Services Oper, for example, You can't
# register NewTester or Tester123 unless you are an IRC operator.
# IMPORTANT: Remember that you have to be an ircop if you want to
# register the root's nick when setting up Anope for the
# the first time.
#RestrictOperNicks
You have the above enabled, this is why nicks like P, Q, and Rick stop you registering poo, queen, and patrick.
Go and comment that back out again, and restart Anope.
The problem will disappear...