Standard WP Custom Menu Widget Broken?

I am using the plain’ol custom menu widget that comes with WP – NOT a plugin.

I’m using the Genesis framework and the Education Pro child theme.

I created a Category called International Students Posts
I created 3 posts with this Category
I created a menu called International Students Posts, and put one item in it – the Category International Students Posts
I added the Custom Menu widget to my sidebar, and selected the menu I created

On my page, in my sidebar, I see a link to the title of the custom menu, and when I click it, I land on a page with the three posts from that Category. This is NOT what I expected, or what I am 99% sure it did when I first tested this functionality for this site.

The way I thought it worked before is that I would see the title of the custom menu, and then a link for each of the 3 posts listed below that in my sidebar. I could then click on each post, and see each page individually.

I feel as if I have gone crazy – or perhaps just spent too much time at my computer.

Have you seen this before?
Is this the expected behavior?
Is there something else I need to accomplish the desired state?

Thanks!