I get notified in a timely manner when someone approaches the door. But by the time I see their picture, they're already gone. This defeats the purpose of having a camera. I don't have blazing wi-fi speed, but I have 12 Mbps download and 4 Mbps upload, and I have a wi-fi signal booster near the door. My software is up to date and I have a relatively new router. Any ideas?