Chamblee is a rarity in metro Atlanta, where the council districts only limit who can run for city office — not who votes. Residents vote for all council seats regardless of which district they call home. The five-member council consists of one representative from each district plus an at-large representative, who can live anywhere in the city.
Redrawing council districts after a Census update is not uncommon. DeKalb County and several of its cities, including Brookhaven and Doraville, had to redraw their district lines due to uneven population shifts.