For some reason it bothers me when I go to the hospital to have my baby, I see a ghost tending to the front desk. I miss how rare seeing a ghost used to be.
I guess ghosts can have jobs now. This is new to me. I play with aging off. My ghosts are in the family inventory. If my Sims avoid telling ghost stories by the campfire I don't have any ghosts. Anyway ... keeping my fingers crossed.
The ghost that you don't like should be in manage households. Pop in there and delete the ghost. That's what I did before I discovered what triggered them.