1. As I mentioned before, multiple passages through monoliths to the same zone are generated. There is no example, but this was in every game on 6lm, so it is likely to occur in new generations as well. Ideally, this type of passage through a monolith should be prohibited; otherwise, the monoliths should be made identical (but then some of the atmosphere is lost).
It is possible that this was indirectly influenced by the increase in the number of 2-sided monoliths. And it would be better to attach a save file with an example so that the problematic situation is clearly understood.
I think this should be related to the size of the zones.