I didn't understand how CARM can be decreased 2 orderes of magnitude and PRCL can be INCREASED by such small offsets (see the matrix quoted).
Apparently it was because of an optical-spring ish effect from the "detuning" (which is actually RAM position offsets). I put two plots which are CARM and PRCL tranfer functions to REFL f1 or POP f1, when there is a slight PRCL offset (0, 1e-14m, and 1e-15m cases are plotted). Looking at these plots, it was not a good idea to calculate the LSC matrix in DC because they are affected by this detuning a lot. I'll try f = 150 Hz for the matrix.
*** Iteration ***
%*.*.*. Resulting matrix w/ RAM .*.*.*
REFL f1 : 0.039125 -0.000000 0.003665 0.000005 -0.000007
AS f2 : 0.000010 1.000431 0.000009 -0.003500 -0.000002
POP f1 : 156.420221 -0.000246 15.586838 0.019406 -0.000154
POP f2 : 1.255806 -0.154275 0.047313 1.000008 0.024285
POP f2 : -34.814720 -0.006600 -1.884850 0.042950 1.000000
Offsets converged to:
PRCL = 2.1e-15, MICH = 1.1e-17, SRCL = -3.8e-15, CARM = 2.2e-16, DARM = 0