Texture Painting Image I paint with crops or changes shape

So I am starting to create mesh images by texture painting with images. as this image below describes I am experiencing cropping on the image I am trying to paint with. Parts of this image I paint with is being cropped off I’m digging around in all the many places that a ratio could be found but haven’t

yet to find a setting that would hint at controlling this. So I add to the sides of this image and then it wants to change the shape of it at that point.

That is more than likely a UV issue as far as I can tell from your image…
Did you unwrap the mesh?
Can you show just the UV window with that part and the texture?