Look, it's not very complicated: When you see Eliezer write "morality" or "oughts", read it as "human morality" and "human oughts".

It isn't that simple either. Human morality contains a significant component of trying to coerce other humans into doing things that benefit you. Even on a genetic level humans come with significantly different ways of processing moral thoughts. What is often called 'personality', particularly in the context of 'personality type'.

The translation I find useful is to read it as "Eliezer-would-want". By the definitions Eliezer has given us the two must be identical. (Except, perhaps if Eliezer has for some reason decided to make himself immoral a priori.)