There's a good mission called Tied Down that appears on my city map. When I get close to it, the good mission indicator appears on my minimap, but once I start getting closer, the mission disappears and I'm left with only the evil missions.
Once it disappears, it's gone from my city map, too. Once I complete another mission, it's back on the city map, but again it vanishes once I approach.
Am I doing something wrong? My karma is Champion rank.