DH not properly assigning LODs to dimensions?

I might be misunderstanding how DH assigns LODs to dimensions, but playing the modpack ATM9, the mining dimension (allthemodium:mining) keeps getting built within the overworld, causing chunks to be completely mixed and looking very broken. Other dimensions added by the modpack do get populated properly. The F3 menu does properly identify the dimension as I switch back and forth. Is this a limitation of DH or a bug? Enabling multiverse dimension matching causes a lot of other issues and generally doesn't work: getting the similarity ratio just high enough that it won't carry chunks over from one dimensions to the next causes a bunch of extra LOD databases to be created, and LOD building to be reset very often. Same issue appears in 2.0.1-a, 2.0.3-a-dev and 2.0.4-a-dev