Ghosts must explain a massive head-scratcher, which ties the show together but makes no sense logically. While the show encompasses some pretty bizarre happenings, the Ghosts story has a wealth of lore that maintains consistency throughout the series for the most part. The most essential element of Ghosts‘ mythology is the ghost boundary, which keeps all the ghosts inside the Woodstone B&B grounds. It is presumably the approximate property line of the estate. Still, the ghost boundary doesnt match the Woodstone B&B timeline, which suggests that multiple ghosts lived on the property long before Woodstone Estate existed.

https://screenrant.com/ghosts-boundary-woodstone-mansion-mystery-explanation-need/