ZBrushCentral

Color Problem: Subtool is dark and can't paint with selected color

I am not sure what is happening in my file, but perhaps someone out there can assist me.

I am painting on a subtool with pure white selected using the standard brush (RGB Intensity: 100). I have filled my object with the Flat Color material. When painting on my object, with white, my strokes appear gray (approx. 50% gray.) I then drag from the color palette to sample what I just painted and the swatch slides to gray. Furthermore, if I continue to paint with the 50% gray selected in the same region I was painting previously, a now darker shade of gray is applied.

Under Polypaint Colorize is turned on, and the texture channel is empty.

Does anyone know what I did to mess things up here? Any help is appreciated.

do you have “gradient” turned on?

Thanks for your response. Gradient was not turned on, but I had around 10 Mil points in my file. I killed some of the topmost levels and got the points down to 2 Mil. After restarting the problem has gone away.