I’ve found a couple issues as I’ve been investigating this, but I don’t think that any of them are the issue that you are seeing. I am going to keep digging into this until I can figure out what is going on.
In the mean time the good news is that those numbers are the raw data needed to compute the calibration so I was able to compute it for you here if you want to skip figuring it out and jump to the answer.
Fitness: 0.6394170814561981
TLX: 2.8261539845787076,
TLY 2436.220662692549),
TRX: 3661.4228035375863,
TRY: 2431.6915843703505
BRX: 3657.194987003678