Dr. Seuss and Weslow tabs question

I bought them both a while ago and brought them to the drugchecking my city offers. They can tell which substances are in your drugs and how much if it. I bought 100ug of both Seuss and Weslow tabs. Brought them in.

Seuss 3.0 100ug came out as 56ug Weslow 100ug came out as 68ug

Is it all just a fucking hype with that those are the real deal and that they are always accurately dosed and stuff? Or is it that the drugchecking can not really accurately tell how much is laid on the tabs?

Just wondering i mean im totally happy with the amount they got on but why advertise it higher i dont understand.