What is your and your friend's location (city, county, state only) and what are you monitoring? Can you have your friend export hpe files of favorites lists and post them so that I may look at them and check for problems? If your friend is using zip code scanning, there may a need to do favorites lists. Your friend can send me a PM if there are any questions. I use the SDS100 and SDS200, am surrounded by simulcast systems, and have no problems.