First, I have 1,550 posts — but I’m only trying to sort the first 30 or so, FWIW.
As directed, I also opened the console. And this was there:
/wp-content/plugins/wordpress-seo-premium/premium/assets/js/wp-seo-premium-quickedit-notification.min.js?ver=2.2.1:1 Uncaught TypeError: Cannot read property ‘replace’ of undefined
Does this mean that my problem is a function of an error in Yoast’s code? Please confirm so I can thank you again and go bug them.