Ethics is the subject in which you argue about which ethical theory is correct. In meta-ethics, you argue about how you would know if an ethical theory were correct, and/or what it would mean for an ethical theory to be correct, etc.
See here for a previous comment of mine on this.
First, is ethics only about decision procedures? The existence of the concept of moral luck suggests not. Sure, you can say lots of people are wrong, but to banish them from the field of ethics is ridiculous. Virtue ethics is another example, less clearly a counterexample, but much more central.
The three level hierarchy at your link does nothing to tell what belongs in meta-ethics and what belongs in ethics. I don't think your comment here is consistent with your comment there and I don't think either comment has much to do with the three level hierarchy.
M...
There seems to be a widespread impression that the metaethics sequence was not very successful as an explanation of Eliezer Yudkowsky's views. It even says so on the wiki. And frankly, I'm puzzled by this... hence the "apparently" in this post's title. When I read the metaethics sequence, it seemed to make perfect sense to me. I can think of a couple things that may have made me different from the average OB/LW reader in this regard: