Progress indicators seem to go straight to overflow colour

What percentage of a document colour shows as Start, Middle, End and Overflow?

On a 3000 word chunk of writing, the first three seem to be very small percentages in comparison with the overflow.

Screen Shot 2018-05-18 at 16.13.52.png

The red colour will be used until you reach the minimum target - you have set a minimum target, as can be seen by the vertical line shown in the progress bar.