Subtotal Visualization - Shows an Extra Blank Count Column for Row Totals

[sunnygud]

Found this issue if we are trying to add Row Totals.
Source : https://github.com/looker/custom_visualizations_v2/tree/master/src/examples/subtotal
Java Script : https://looker-custom-viz-a.lookercdn.com/master/subtotal.js

Our Data is Hierarchical Org Levels reporting Structure >

1. L2 >> L6
2. We need to know the Employee vs Contingent Counts
3. When we Pivot Category = Employee / Contingent, and a Row Totals thats when we see a an Additional Column its awkward to hide.

The same doesnt happen if you dont do any Row Totals., Any fix for this is appreciated.

Question : Can someone educate us if this Script reads the data and sends data externally or caches any information on the hosted server?