You can say the 0-96 "pressure" signal works inverted, but that would be wrong. The 0-96 "pressure" signal is directly related to line pressure. The force motor table lookup converts the "pressure" signal into line pressure and the inversion is done in that table. A "pressure" of 0 gives the highest current and a "pressure" of 96 gives the lowest current with a lower giving a higher line pressure.

The offset table would have to be subtracted from the main line "pressure" for the table to work in reverse. This could be happening. The only way to know would be following the value through the code and seeing what is done with it. A simpler way might be to hookup a pressure gauge with the table values set to 0. Kick it down and see what the pressure does. Then, program the table values to -50 and kick it down again and see what effect -50 has on the pressure.