I generated a style pack from an old set of paragraph styles. The List style is showing up as a semibold. The original paragraph style I mapped to it is the light weight of the font. I checked for extra character styles on it but there aren't any. The only way to get my bulleted list to appear in the correct character weight is to manually apply a character style to it, defeating the functionality of the style pack.
Is there some hidden rule somewhere that is controlling the font weight on List, but not on the other styles? (they are all displaying correctly).
The style will be lifted from the Bullet itself - so for your style for Bullets - you can edit that style, go to the font and change it to the Light Font.
If that is not the case - go to the Bullets and Numbering section and in the Bullets section you can set the character style there.
Ok, I solved it, and the problem was between the keyboard and the chair.
I was using a set of styles from an old document, and I'd forgotten that I'd created a nested style which bolded the first sentence of every paragraph of bullets. It didn't show up because coincidentally, none of the bullets in the document I was testing Auto Styling on were longer than a single sentence. I didn't see it until I was clicking about randomly and applied the Lists standard to a different paragraph. So. Oops.