I have gone through and optimized all of the Gold Edition maps for Intelligent Enemy Positions and to eliminate all wall spawning. I've uploaded it to the GR Hideout, but it really does belong at GR.net, including on the Mission HX download link. I also completed a Frostbite version that does as well!
YOTM is my next objective, but I ran into a problem with figuring out which .mis file to use. I re-did a BH map of Xom Dong Night and checked the Available for Custom Maps box when I renamed to MHX. Yet, the map isn't showing up in the multiplayer list.
I see the duplicate when I switch to Mission. I've not run into this problem ever before.