Some “Screen options” seem to be missing

UPDATED. MADE A MISTAKE. PLEASE SEE MY REPLY BELOW BEFORE RESPONDING. THANKS.

Hi there,
I notice that when I click the Screen Options button whilst viewing the list of Pages or Posts on my site, that very few options display. I recalled there used to be many more than I see. I looked this up in the WordPress documentation and see that there should be more. Here: http://en.support.wordpress.com/screen-options/

For instance, it says I should see the following options for:

• Post – Post Tags, Categories, Excerpt, Send Trackbacks, Discussion, Comments, Post Slug, Post Author, Post Revisions
• Page – Attributes, Discussion, Page Slug, Page Author, Page Revisions

What I get is this:

• Post – Author, Categories, Tags, Comments, Date
• Page – Author, Comments, Date

I thought perhaps it was my admin theme (Fluency Admin) but when I turn that off it does not resolve the issue.

Is this normal or is my site doing something odd?
I would like to get the display of this pertinent info back.
Any help greatly appreciated.

With thanks,

Jonathan