Even though all units are set to require that all pages are viewed before access to the next unit, the student can still access all units without even opening the first one.
Quick video preview: https://www.youtube.com/watch?v=L_M85EySZIg
I am testing with a student account, not the admin (I switch to another browser in 0:15 in the video).
Using the latest CoursePress and WordPress and PHP 7.1.1.
I have granted support access.