Rainbow Gauge (Minimum Values and Scales)

Hi all, 

First time posting, so I'm sorry if I miss any required details (and will happily provide any if asked). 

I am using the Rainbow Gauge custom visual (link here) to visualize some KPIs for my organization. The minimum value for one of the KPIs is -5 and the max is 15. When I use -5 as the "Min" value it shows the label as -5 but anything referencing it seems to view it as a zero.

As an example, one of my Measure values (Actuals) is -1.6. It shows the pointer way below the minimum value. 

I'm having a similar issue with another one of my gauges. I have a training metric and I'd like the minimum value to be 97 and the max to be 100, with a target of 98. When I fill in the approprate values, the 97 is listed as the minimum, but it is being referenced as a 0. The only way I have been able to get appropriate color sections is to give the color values of 30,70, and 100. 

Any help would be very appreciated! I tried to do this same thing with the Dial Gauge and was coming up with the same kind of problem.