I posted recently about a similar issue but switched out the code I was using.
I implemented the following code: http://jsfiddle.net/outerwhitespace/7cwpojfo/8/
on my webflow site here: http://cerimani-new.webflow.io/our-collections/favo-collection
Read-only link (ignore the view all page as I started trying to use a filter plugin with no success):
The problem is, instead of showing (for example) Collection1 OR Collection2 OR MetalType1 OR MetalType2, I need it to show Collection1 OR Collection2 AND MetalType1 OR MetalType 2, etc. Didn't know how to group each category together.
My brain is SO fried after working on this for days and any help is appreciated.