I am not criticizing Tmax nor am I extolling its virtues. I am merely pointing out what was brought forward in this thread. Several batches of the same film seem to have different curves. These curves may be indicative of a problem or they may be at the extremes of the nor for released product. But, there have been samples run through the same process taken from different batches of film, and they differ. This is not a problem with a densitometer nor is it a problem with a process as these two results seem to be possible from the same exposure and process.
So let us avoid the side non-issue of calibration and etc. and look at the results which are odd to say the least. And therefore, contacting EK may help, as Bill Burk has pointed out in his story!
And remember, some of us do know one another either in extensive exchanges of private mail, or in person!