Real random integer?

how can I get a spread of integer numbers of a given number of slices out of a spread of changing number of slices without any double?
I am trying the Random (Value) node but although it does not create doubles on a scale=1 factor it does create doubles with integer enabled and a given number of scaling.
I d call it this a urgent question guys…

mmm doing it with the Shuffle modules so i just get a sequence of slice and shuffle its input, any other way around it?
S. maybe?

Yes that s what I am using right now, seems to work, but then should we consider the Random (Spread) as buggy of some of its functionality?