CS forms: Filter and Faceted (OR instead of AND)

Hi,

I have archive layout page, fetching portfolio items. (ref themeco YT video)
Im using CS forms to filter (4 checkbox lists) the results (portfolio categories).
Each checkbox list has a looper provider (All terms: Parent term) and a Looper consumer (all)
It works well, but the issue I have is when i select filter from different checkbox lists, then results come as OR instead of AND.
Results are messy.

I do I change it to AND?

Thank you