Short answer
HubSpot's KB: segments go in one folder at a time, though folders can nest. For automatic grouping, use a filtered segment view.
1. In HubSpot
The relevant screen in my demo portal.

2. Worth knowing
Pair folders with naming conventions.
One folder per segment, with nesting.
HubSpot's KB: segments go in one folder at a time, though folders can nest. For automatic grouping, use a filtered segment view.
The relevant screen in my demo portal.

Pair folders with naming conventions.
One email when a new article publishes.
If this did not fix it, the problem is probably specific to your setup. Book a call and we will look at it together.
Book a call with Sam