To ensure you capture all constituents in a radius search: 
  1. Ensure that all your address are geocoded.  How to globally geocode addresses
  2. Ensure that the missing constituents do not have a PO Box as their address, PO Boxes do not map. 
Follow these steps as an alternate solution. 
  • Once you generate your radius search, note the area the search covers
  • Remove the radius search
  • Hold down your shift key on your key board and click and drag to create a square on the map where the radius search was. 
  • Select 'find Records with in this area'
 This will return the correct amount of constituents for your radius search.