APTS FCPX 10.3 training manual

p.155 Adding and Trimming Connected B-roll - why is my first edit not appearing brown on the timeline as per the illustration in the training manual? It is the same blue colour as the below primary interview clips?
I thought the different colours were to distinguish different uses of media on the timeline?

Many thanks.

Many of use use the eBook version, what section and sub-section number?

Found it, and what you're seeing is the clips color based on Audio Role. You must have skipped the section where you assigned roles to clips, especially the audio roles. Section 3.5 covers all of that, you assign those Roles/colors manually. It has nothing to do with the actual edit in the timeline. Simply color coding of the Roles assigned to the clips.