PD18, PD19, and PD20 are a prime example of PDs that should be read as one passage in my opinion. Those breaks are not in the original text, but I wish I could find when they first show up. They certainly aren't in the Arundel MS 531 manuscript at the British Library (from 1450-1500). Just scroll to the final pages, Book 10 is at the end. Even if you don't read Greek, you'll see there's no list. Just paragraphs of text.
This Latin translation from before 1439 also has no breaks in the PDs (for those who read Latin).