The nodal displacements that you see in the postprocessing tables represent the total displacements of these nodes from its original position. For drift computation you would rather want to know the relative displacement of a floor with respect to the floor below. You should refer to the output corresponding to the PRINT STORY DRIFT 0.01 command that you have used in the model. In the analysis output file ( ANL ), STAAD.Pro will report the drift and also report PASS or FAIL depending on the limit ( which is L/100 in your case ). I see all the drift check is passing for all floors even with the factored cases.
Actually you may want to add some unfactored service cases and use a separate LOAD LIST command before the print story drift command so that drifts are reported for the service cases only.