When a player taps on the reset button in City Watch, and there is a lag, it is queued up in line to be used. So if you do not see a reset occur right away, it's best to force close the game and relaunch, so your City Watch can reset. If a player taps on the reset button repeatedly, then both resets will be queued up and used. Be patient!
For any other question related to this, please contact support.