I went ahead and setup an NTP server for my NVR and made sure all cameras weren't syncing to anything but the NVR. If I understand your comment you are saying it's best to manually set the time in the NVR, configure DST settings and call it a day?
Don't know why but some of my channels seem to lag a second or two behind others...
In a perfect Dahua World all this time crap would work, Yes uncheck both and let your nvr clock just run by itself, Just as a test for a while and see how it goes. The NVr clocks seem to keep pretty good time. A second or two on the cams could be network lag.
Look at the picture I posted, that is how mine look. all unchecked with default Time Zone.
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