Autonumbering in FrameMaker text insets changes from bullets to numerals

I am working in a FrameMaker (version 17) book and the lists in my text insets in one of the FM files unexpectedly changed from bullets to numerals:

I checked the source file that contains the text insets and the lists show bullets as expected:

The numbering in the two other FM files (Spanish and French) is correct. 

Important things to note:

1. I did not create this book, so the text insets were already there.
2. The source file that contains the text insets is used across multiple FM projects and I checked other projects and the numbering is fine.
3. When I select a text inset property in the impacted FM file, and go to Edit > Text Inset Properties > Settings, this is what I see:

I’m sure I’m missing something obvious, but there has to be a way to revert the lists back to bullets without too much re-work.

Thank you.