Re: I've been looking into it.
That seems to have fixed it. The add new post is now on the author page and the taxonomy list shows up on the new post page.
I had a feeling it had something to do with that editor designation but when I saw it on the Rita UI I thought I was wrong. Then I saw that the same problem is there for Rita's profile, editor designation and no new post option on the author page.
I still don't see senior poster on my profile. Is it supposed to be there? I assume not.