TZORG, the problem is that Posersometimes  makes joint falloff zones apply different deformation to left and right sides, meaning that they don't bend the same way.  This can be seen e.g. on SP3's feet and conforming shoes, if you look in the Front camera.  As to why it's impossible to fix, even if you type in values that are mathematically symmetrical when editing the CR2 by hand, the still don't apply a symmetrical deformation.  It seems to be a matter of luck where this bug will appear, but there is some pattern that I don't understand because once it's there, it's there to stay.  Note this is a different issue (I think) from the other problem that the center line bones in this case were not quite centered.

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