First Franken Mesh - weird squares

I am wondering if it has to do with the recoloring of the area. That may be that specific square is still on the texture map. The greyscale map that is recolored. When frankenmeshing the texture maps used for each item has to be readjusted to the way the new mesh has been put together. If you adjust that one part of the texture map to where it should be the "new" texture for that one part, when u recolor it. That square should be gone. You should be able to use ur 2d editor and do cut and paste like you did for the other parts. If that area is very small on the map...you can also so light small strokes in a diagonal motion from the dark color to the light color of a smudge. This will move the dark pixels to where the light ones are. You can make them line up that way as well. Just remember to go slow and smooth diagonal strokes. And get the top of the dark part to line up with the other dark parts of that area. Either method will work but only do the method of your choice on the greyscale map; otherwise, you will have to make the adjustment every time u recolor. Let us know how it turns out.
Merry Christmas to u as well. ---goldilockssims