Kinda hard to dig that answer out now though, so if you know it, what's the shame in writing it down for the people who don't know?
Fair enough. Microdungeons can't be done procedurally because to do such intricate designs procedurally isn't worth the effort. Dungeons, including micros, can have some procedural element to them in that individual connected parts can be exchanged, but micros (probably because they're "micro") are each just one part. You'll notice that there's some funky natural formations on the surface -- these too are technically a kind of microdungeon, for a similar reason.
I would like to ask for some advice from anyone who might know,my unstable version and nightly version both do this. But I tried to play them and it updates 2 times,then download pauses,done this for 4 hours now,any suggestions or is this normal?
Awesome. Hope there's some kind of reasoning for them existing where they are. Seems moot if they are just random scenery. Much like the bigger dungeons having a purpose. Hmmmm... archeology!