In the implementation of the Sensitivity Analysis and Parameter Variation module up to and including 2D Classic, the varied values for the K0-procedure are not taken into account in variations of the projects, even when the Initial stress K0-values are set to be automatically determined based on the friction angle.
Within the Sensitivity Analysis and Parameter Variation module of those versions, you will always have the same initial stress condition when using a K0-procedure to generate the initial stresses.
In the first release of PLAXIS 2DAE, this module had been discontinued temporarily.
In PLAXIS 2D 2015 a new version of the Sensitivity Analysis and Parameter Variation module has been release, where it now correctly includes variations for K0-values.