(Issue #AV-IS-0209-741) Filtering API is not working as expected

Referring to https://backend.shoptype.com/api/#/platform/get-platforms

One can form AND/OR combinations. Example,

tag1 and tag2 ==> tag1,tag2

tag1 or tag2 ==> tag1:tag2

(tag1 and tag2) or (tag3 and tag4) ==> tag1:tag2,tag3:tag4

But this does not make sense:

The first example shows tag1 and tag2 ==> tag1,tag2 (ie and is ,)

2nd examples shows tag1 or tag2 ==> tag1:tag2 (or is : )

So how can this be correct:

(tag1 and tag2) or (tag3 and tag4) ==> tag1:tag2,tag3:tag4

And then taking that 1 step forward, this query https://backend.shoptype.com/platforms/cb843ac5-7c50-9f31-f239-69f3a6ea410a/products?count=40&offset=0&tags=cannabinoid~thc,thc returns 79 products.

But this https://backend.shoptype.com/platforms/cb843ac5-7c50-9f31-f239-69f3a6ea410a/products?count=40&offset=0&tags=cannabinoid~thc,thc:vape~cartridges return 10.

How can an OR condition return less than the original??? It may return the same or more.