I believe that's a function of T/O trim. After resetting FCS but before pressing T/O trim, I see 9 degrees nose down STAB when pushing the stick forward. After pressing T/O trim, the STAB shows 12 degrees nose up with no stick movement, and 3 degrees nose up when pushing the stick forward. The difference being the 9 degrees. Also, I don't believe the stabiliator moves the same amount when pushing the stick forward as it does when pulling it back, because the negative G limit is -3 while the position G limit is 7 ( or higher when holding the paddle switch )
The NATOPS says when cycling the controls after pressing FCS Reset, T/O trim, and setting flaps to auto, you should see the following:
Full Aft: 24 NU stab
Full forward: 3 NU stab
R/L aileron: Check 20 units differential stabilator. Check differential trailing edge flaps.