Nope, it really shouldn't, but I still wouldn't worry about it. There is nothing that can be done to defeat the alarm from the keypad
and they will have to either take things from the hallway only or proceed to any room setting off the sensor anyway
HomeControl+ app is free and Pyronix Cloud is free for year 1 and £36 per year to end users there after. This is for LAN or Wifi for End User accounts.
5 is as good as it gets whilst still avoiding the rads...
3 and 4 for me much of a muchness, if 3 is a little bit further from the rad, that's possibly better.
The microwave beam can go through walls - but that's why it's adjustable to prevent that when it's installed.