Oh, I have figured it out! It’s related to the English US locale. It appears that a well-meaning translator had translated every instance of the word Left into the word Graduated, without realizing the nuanced use-cases for the Left status. I have corrected this in PoEditor and GitHub. The best way to ensure this is updated for existing installs is to delete your en_US folder from the i18n directory, then use System Admin > Manage Languages to re-install it.