Help what to do if no check mark 64x32? 
I removed the convert to pre 1.8 64x32 checkbox because it was simply cropping the image, discarding the overlay and the different color for each arm and leg information. Making the skin look different from its screenshot. There is no point in keep saving 64x32 textures, unless…
Unless if you need 64x32 skins for other software that only support the old format, in this case, use the old editor here old.minecraft.novaskin.me