Step speed loss understanding

Hi. 

Is it possible to get some help understanding step speed loss. 
There are two charts for it, one step speed loss and one step speed loss percent. 
I’ve attached a photo of the last run I did, and it shows a whole lot of red dots on the step speed loss section, that’s not good. 
But on the percentage section it’s a lot of green dots, and that’s a good thing I guess. 
Why does one have many red dots and one have many green dots? 
Shouldn’t those two show the same? 
Or am I missing something?