Okay, I have disabled all plugins. I have deleted the social menu leaving only the “Top Menu”. The “Top Menu” has “Home” and my three “Custom Link” entries on it, “Thing One”, “Thing 2”, and “Thing 3”, which is all I want.
I have created four pages, “Page 1”, “Page 2”, “Page 3”, and “Page 4”.
The checkbox for “Automatically add new top-level pages to this menu” is not checked.
So far, so good?
However, on each page, when I try to set the “Parent” parameter, the choices are only “Home”, and the names of the other three pages. There is no choice for “Thing 1”, etc.
What did I miss?