I took no chances with my mocha coffee after losing six cups a few days ago. I not only stayed in the room the whole time it was brewing, I made the camera document the levels of water and coffee. There were 10 cups in the reservoir.
The machine yielded just under 10 cups of a very satisfying brew.
I am no nearer solving the mystery of the missing coffee, but I have ruled out murder and theft on the part of the coffeemaker.