[DRG]

There may be different code for the large special buildings that is not in the smaller multi hex residential buildings in regards to the registration hex. It's been a couple of decades since I ran the basic SP2 but I seem to recall large buildings were only allowed on level zero, IDK it's been a L O N G time.

I suspect this has been going on for years....it's just that now it's been noticed it seems doubly obvious. It's not 100% but note that when the registration hex is clear ground that's when the road shows up....... mostly