EDIT because I misread the post I linked to and so only this bug actually exists:
8 buildings should be +200% generation for 105 g/m, but they seem to only produce 102/101.5 (I say 101.5 because 2 mines with 8 buildings give a overall g/m of 203 according to the hud). Interestingly, a pit mine on a large gold and 12 buildings correctly gets +300% for 140 g/m. Really not sure what’s up tbh.
This is all wrong, whoops…
As per this post, pit mines are supposed to share their building count, however they don’t seem to (screen shots below).
*As you can see, the pit mine only generates 35 per min and 5 per cycle despite my other mine having a full set of houses (apparently I can’t submit a screenshot of both since I’m a new user, but you can see it on the minimap and it’s producing 102 g/m). *
EDIT: I got promoted a trust level so I’m able to add the other screenshot.