[?] Colormap & Editor/Colormap difference?

What's the difference between these two file locations?

I've been working on a tool that merges all the txXXxYY.dds files to a single image so that i can edit it wholly, and later splits them back up into their respective pieces. I noticed that chaning the Map\Colormaps and reloading the map made no difference at all, but when I changed the Map\Editor\Colormaps suddenly the ones in Map\Colormaps take effect.

So I'm very confused here trying to figure out why the heck there are two sets of them.