1. The thread,
http://forum.tvfool.com/showthread.php?t=109 provides several examples of how to use the data in your TV Fool report.
2. Yes, too much signal power can overload a tuner. You may be close to that point if you selected a deep fringe, high gain antenna. But you don't need a high gain antenna, so let's not worry about that happening in your case.
3. A compact antenna such as the RCA ANT-751 will receive best from the direction it's pointed. But it also receives fairly well from the opposite direction. It's not extremely directional and has modest gain. My suggestion would be to point an ANT-751 at 168° compass. You should expect to see the distant signals from the US stations while the strong local signals would still be received through the back of the antenna.