Semantic Common extend collection not showing up

Hello, 
My org uses PrimeOne components, the out- of -the- box token structure is…

• Primitive
• Semantic Common
• Semantic Color Scheme (light/ dark) 
• Component Common
• Component Color Scheme (light /dark)

The org has two separate products that operate on 2 set of design system, which I want to consolidate into one master DS and leverage tokenization/ nested collection for different brand styling. 
Thinking Semantic Common could be the first collection that start to separate brand value through newly added nested collection

• Semantic Common (Parent)
  ├─ Brand 1 (Extended)
  └─ Brand 2 (Extended)

However, the issue is these Extended collection is not cascading down (Not showing up in libraries). It is suppose to show up under Semantic Color Scheme Collection. 
Since the values from Semantic Common collection is simply not showing up, so I cannot choose the correct value. I have set the scope to “show in all supported properties”, unchecked “hide from publishing”, reload the file several time. 
It still will not show up in Semantic Color Scheme, could someone shed light on this? thank you!!