At the very same time the split offs of Loei and Ubon were made and there they did make new colors there (hey-was that already in Thaksins times to please the reddies from there by creating more highly paid govmt jobs?). ANY Thai map has some errors, just like in the past any Soviet map. That was to mislead spies, for Thai its general clumsiness with maps in general. Maps are not made for Thai, they cannot ´read´ them anyway-they are made for those nasty faran who always know all things better or for the archives to collect dust.