Notifications not always working

Have two spotlight cams set up, with good wireless signals, good battery life, and everything set up to provide push notifications when motion is detected. Maybe 10% of the time I get a notification, if I'm lucky. I even walk in front of them myself sometimes to test... Nothing. Defeats the purpose IMO, and I want to see if others have experienced this issue before I return them. Also, is it normal for all my videos to take 10-20-30 seconds to load?? Seems odd how long it takes to see a video of something that happened a few seconds earlier.