Landscape breaking while painting

Hello,

I have created a material and I am using a constant 3 point vector to define the color on the landscape. When I am using the paint tool and I am trying to apply the specific layer, it almost looks like it is erasing parts of the landscape. What would be causing this? I was having a hard time finding this online elsewhere/what to exactly look up to find this.

Thank you in advance!

-Reaper