Sorry for the double post.
• Load the tileset and click save.
• Reload the whole rom to make sure it fits.
• Redo any tiles you did if it doesn't show up properly.(It would even be best if you made a guide for the tile. Paint it completely in different colours, red, green, orange, yellow and place a key to signify which colour is what colour on the palette.
 is  on the palette.
Again sorry for the double post .