As far as I know, DMSS notifications are all cloud services. Trying to use your own VPN or port forward for notification playback messes this up.
General recording is 24/7 (or the time scheduled). IVS is for human/vehicle's triggering recordings/events.
Anti-dither is a motion delay to provide some hysteresis (stops it falsely triggering for a minute change).
Turning IVS on/off changes how the camera records and if it pushes IVS notifications. You may need to re-enable IVS notifications in DMSS app again (so that the app makes a notification about the event).
Yea i dont know whats going on.. It was working this morning with all the same settings the way they are now. So it doesnt make sense.. wish i had just left it alone when it was working.. i just wanted to figure out why it started working.
I may try and add the cameras to the dmss account instead of adding them locally.. im lost on why it quit working