They already fixed the issue I had noticed
As for what you are seeing... The colour gradient appears based on the scale you set (as compared to the data input). For example I have tested it with a potentiometer on an analog pin (range or 0-1023) and on the display that I set a range of 0-10. The display will still show the whole range of the pot, but the colour gradient will very quickly go from green to red (or blue) during the range of 0-10 and stay red for the remainder of the 11-1023.
I find that adjustability great for when showing the temperature... I set the gradient from 15-35 so that colour gradient is fully utilized in the typical range that my thermometer sees.