Swatch textures pixelated more than others. {SOLVED}

It looks like you've got bits missing from your texture files, like you cut and paste at some point but you didn't have all the pixels selected when you cut (I've had issues with GIMP where I'll think I have all the bits of an area selected using fuzzy select or color select but when I go to cut it I find there's bits and bobs missing and I have to reselect the affected area; I think you may have had a similar issue at some point). You can recolor the problematic swatches based on the ones that don't have the issues, or you can add a layer below the one with your texture, select the bottom area, and then on the below layer add fill in that color before merging it down-- that should fix it.