Power KPI Matrix - "second KPI Indicator Value" and sparkline formatting

In the Power KPI Matrix sample report "PowerKPIMatrix.2.1.4.0.pbix" their is an instruction page of "KPI Indicator Instructions". On it there is a yellow card describing "Do you support KPI values from Analysis Services (Such as -1, 0, -1)?" which says:

Yes, you can map the desired numeric index value to each KPI. The default Value is "1" for KPI 1; "2" for KPI 2", etc. However, you can change KPI 2 to use a value of zero and KPI 3 to use a value of negative one, etc.

Power KPI Matrix has a similar column to "KPI Indicator" (titled "KPI Status" on the sample report) of "Second KPI Indicator Value" (titled "To Prior Year" in the sample report). This column does not appear to apply any of the formatting from the "KPI Indicator" formatting section, custom or otherwise (My data source is SSAS MD KPIs). How can I have the "Second KPI Indicator Value" be similarly coloured?

Thanks

Gord