Penumbra: Black Plague - Problem in Examination Room

[Vloddamick]

So I think i did somthing in the wrong order if that's possible.
I went to the examination room before doing anything else. I got all the chemicals and mixed them in the machine. Then I went and did the kennel, Research room, Chemical storage, and now that i've inserted substance 65 into the chemical machine it says the "inseficient cheminals" even though all the chemicals are in it. Another problem is that any save before doing this is gone. (I think that is a big flaw but...)
So its eather find a solution or restart the entire game over.

Somthing similer happened in overature where I did somthing ahead of time I had to go back and correct it. (anohter flaw...)

So if anyone has a solution I would gladly appreciate it.