As has been mentioned we do have a very annoying issue with Google Maps as it currently does not show more than one pin in the same location. If several members live in the same city it will randomly pick one to display instead of showing a list or some other logical solution. We have explored various options to fix this issue but so far have not come up with anything that resolves the issue relatively easily or without having to start all over again.
We have more recently been exploring various plugins for the forum software which would allow the forum software to members locations and include various details as this would make it easier to manage all the way around. Hopefully we can find one which does what we need it to without too much difficulty.
Completing the survey again does not help and actually only makes the situation worse as it just adds more entries for the same location.