Your first TV Fool report is flagged, "WARNING: Address was only resolved to block level and might not be that close to your actual location. For more accurate results, try entering a specific address or coordinates."
Please consider reviewing the following,
http://forum.tvfool.com/showthread.php?t=14508 and then posting two more reports, one based on the proposed 12' AGL and another base on 25' AGL.
Thanks