Population Cap Problem

[Dendoguy]

My population in my city is 93 and the cap is 90. My problem is that my population wont go below 93, so I cant move or trade resources. Even when I move villegers and troops to other armies or kill them to decrease the population in my city, it doesnt matter cuz once I get below 93 I gain a group of villgers, hoursemen, and archers autimaticly. I dont know if im doing something or if the game glitching on me?