I am clearly not getting something.

Are you saying that ZEN ran a Pilot Plant Flotation test after September 2nd?

I contend that the 92.5% flotation recovery was achieved in a bench scale test(i.e. laboratory or experimental scale), sometime between September 2nd and December 16th.

Just because one Pilot Plant test is run in the summer does not autmatically mean that all future testing is carried out at Pilot Plant scale. Pilot Plant refers to the scale of testing, not the phase of testing.