Optical lever QPD's analog signals from each segment/quadrant come into the ADC in numerical order (1, 2, 3, 4) where the segments are defined as

   +-------+
   | 1 | 3 |  ^
   |---+---|  | This way up
   | 4 | 2 |  |
   +---+---+

(staring at the face of QPD, as though you were an incident laser beam). The QUAD MASTER model absorbs these signals as channels

$(IFO):SUS-$(OPTIC)_L3_OPLEV_SEG1
$(IFO):SUS-$(OPTIC)_L3_OPLEV_SEG2
$(IFO):SUS-$(OPTIC)_L3_OPLEV_SEG3
$(IFO):SUS-$(OPTIC)_L3_OPLEV_SEG4


However, up until this model change, the top level ITMY model had been re-ordering these signals as

Analog Signal    ADC Channel      SEG#
1                1_0              SEG2
2                1_1              SEG1
3                1_2              SEG4
4                1_3              SEG3


I have now re-ordered them in a sane fashion, as the ETMY had already been ordered:

Analog Signal    ADC Channel      SEG#
1                1_0              SEG1
2                1_1              SEG2
3                1_2              SEG3
4                1_3              SEG4


The updated model,
${userapps}/release/sus/h2/models/h1susitmy.mdl
has been committed to the repo, and I've recompiled, reinstalled, restarted, and restored H2SUSITMY.