Hi
Im sure you know you can adjust the sensitivity, but you can also set the interval. So if you set to 2 it will only alert after 2 seconds of motion.
You should also be able to set up the email so it will only send 1 after whatever time you enter has elapsed.
I'm not sure about snapshot sending. I cannot even get mine to do snapshots. I think I need to make a partition on the hard drive for snaps.