you sound like you're confused or maybe those guys are confused. i've been interested in research chemicals for over 10 years now since back in the day when you could buy pure mdma online. there are research chemicals that are synthetic/analogues to every fucking drug you can think of. from coke to extasy and meth.
the "weed" would not have those drugs in them. it would be a jwh-NNN some number increment with a slight tweak to bypass the laws that made the previous number suffix illegal. not meth. not extasy, but a cannabinoid analogue.
i suggest you take a visit to erowid or google swim and research chemicals as a string.
I'm not confused at all, I'm telling you what was revealed in two separate reports. Sounds to me like you just don't want to accept this stuff is garbage and so you try to convince yourself everyone is wrong and they would understand if they would just see things your way.