input variable in set analysis sorting

[StacyCui]

Hi, I created an input variable and define its value as 1,2,3. And then, I use it in set analysis in a bar chart. I'd like to show the value according the input selections and these values are sorting automatically. But, It's not sorting like below, How to fix it?

Bar chart sorting:

Input variable:

Set analysis:

pick($(vswitch_volume_quantity),count(distinct UNIQUEID),sum(ORDERINTAKE),sum(WEIGHTEDORDERINTAKE))