I'm using the pencil tool with a 1 px brush. I'm trying to fill in some pixels, but in the pictures below there are certain pixels I cannot fill in. If I use the pencil tool on them, nothing happens. I thought the pencil tool was to get precision. Why can't I fill in the pixels in the picture below? Also, the pencil tool when it does work, most of the time never places in the pixel in the right spot. If my mouse is hovering over the pixel that I want to fill, and left-click to apply, the pixel below or diagonal to the cursor is filled in! What is up with that?