I had built a couple of residences, and soon my amount of settlers had reached 60, total population 90. Then I teared two residences down, which would logically reduce my number of settlers to only 40, total population 70. But it does not. My amount of settlers is still 60, and total population is 90. In the Mayor's house, my population shows as 90/70.
Is this really working as designed?
How to reproduce:
Build a residence. Wait until settlers have reached max value.
Tear down the residence.
Population will not decrease.