Why are multiple copies of Sites appearing on the Map?
There are a couple of common reasons this might occur. It may simply be due to some duplication in the source data that you are receiving from the providing data suppliers. Some of the datasets being provided have not been fully reconciled by that agency and so you may see duplicate sites although each site references a different environmental interest. The other common reason this can occur is because each time you map to Google Earth it creates a new Sites folder of the mapped sites and by default displays these sites along with all previously mapped sites; the same sites could be in both results sets. To avoid this you should delete each of the previous Sites results sets from the Temporary Places folder in Google Earth. Also, when you close Google Earth, it will ask if you want to save the Sites that you just mapped, and you should answer No to avoid them being duplicated with the next set of Sites you map.
