Answer:
Different results of member and nodal deformation for load cases and result combinations have the following reason:
For an LC, the total member displacement u is calculated from the single displacements ux, uy, and uz.
For the result combination, however, it is possible that the individual displacements ux, uy, and uz come from different load cases. Thus, the total displacement cannot be calculated correctly. The individual maximum deformations would have to be displayed separately, specifying the load cases that lead to those results, and which lead to max and min values.