issue with dimension fitting

The dimension fitting seems to be incorrect for the following dataset (step size and end point):

/scisoft/darfix/datasets/test/NiTi_1PD_002_g411_420MPa_mosalayers_2x/NiTi_1PD_002_g411_420MPa_mosalayers_2x.h5

For diffry the 'start' point is correct. As a consequence the displayed Orientation distribution range is incorrect (because based on the motor step)