Joking aside, please tell us how this happened? Did you add a person and they instantly multiplied or was it OK for a long time and then they multiplied or...?

Also, does the problem go away when you reload the game? If yes, does it ever come back (and under which circumstances, if you have noticed any particular ones)?

Last, but not least, please specify which platform (Plarium/FB) and server (The Pirate Bay/The Golden Coast/Sirens' Strait) you're playing on, and at which coordinates. If it's in the app, does it also happen in a browser?