Using Lucado's Life Lessons 1 Corinthians with add from selected option in Passage List All of Lesson One was selected. The Passage List is as built - no sorting, deletions or additions
Case 1:
Logos invents 2 entries that are not in the text ... they represent the end points of a range that was itself added correctly.

Case 2:
Logos decides to treat a range as a single verse.

Case 3:
From Lesson 2 Logos decides to pick its own starting point

Ironically I was trying to use the Passage List to ensure I wasn't making errors.