Marquis test addy/amp press and pharma

First and second picture- black market supposed to be meth free. I did a terrible job crushing, my apologies.

Third - same black market press. Supposed to be meth free.

Last- pharma/prescription grade. (Looks darkest to me)

Confused about results here. All came out about the same.

Why would that be? Ordered more tests but wanted to see what you guys thoughts.

Reagent from test kits plus and brand new.