Courtesy of reddit; [PUP] Bug Pit Mines overlapping aura - Album on Imgur
If gold mines happen to spawn close together, the influence between two pit mines can be connected and they share the houses around both mines for extra income.
Hey @enept1679! Allowing overlap is by design. That said, I believe the top end value cap either was just fixed or will be fixed—out of the loop on that. Whatever drops with the Season 3 update should be working as intended. Thanks!