When I download maps and look at my list of custom maps in game some spaces will be skipped and maps I know I downloaded will not be there. I assume the spaces in between (Ex. Map 1, "empty", Map 3( Empty represented Map 2 which I downloaded but does not appear)) are where they are supposed to go but when I read the comments on the maps other people are saying how fun they are, so this problem doesn't seem to extend to everyone.