So this began to cause me problems and be annoying, cus at the end of rendering a skin happenes to be a black stain left.
The solution was clear, I had to move the UV position and it was easy since there are 3 empty spaces.
I wasn't going to say anything but came to my mind reading Max's post about overlapping textures he said they cause lag. So now I have that question in mind. (I already came to the conclusion that it doesn't cause lag but I'm not sure since I don't know anything about this topic, So yeah.)