edit: for the downvoters - try it first, then downvote. If multiple people are in the same city/place -> only the last one added is shown, since others are probably overlapped with it.
It seems like the "location" field is just getting geocoded. So some people entered an actual address rather than just a city name. That said I bet there are a bunch of people stacked on "San Francisco, CA"
edit: for the downvoters - try it first, then downvote. If multiple people are in the same city/place -> only the last one added is shown, since others are probably overlapped with it.