In the 3D2010.02, 3D2011.00 and 3D2011.01 versions the Jointed Rock material model does not use the correct (specified) E1 and E2 value. As a result when specifying anisotropic behaviour (E1 not equal to E2) results will be incorrect. Note that when using E1 = E2 (isotropic behaviour) results will be correct.
This issue is solved in the 3D2012.00 version.