LCD Touchscreen - HID Report Descriptor Physical X and Y max does not match

[sysu3peat]

I have a question regarding the reported display size in the HID Report Descriptor for the FocalTech Systems touchscreen (digitizer) used in the Steam Deck LCD.
I queried the touchscreen's report descriptor and decoded it.
Based on the descriptor, the reported physical max X is 2571 (257.1 mm) and the physical max Y is 1450 (145.0 mm).
However, when measuring the Steam Deck's touchscreen, it is closer to X: 150.877 mm and Y: 95.235 mm.

Anyone know what is the reason for this difference in reported physical size (257.1 mm x 145 mm) and actual physical size (150.877 mm x 95.235 mm)?

Is this intentional or a bug in the touchscreen FW?

Attached images below are of the report descriptor dump and decoded report descriptor.

steamdeckdescriptor.txt
steamdeckdescriptor_decoded.txt