I'm still having problems getting SuperDuper! copies to run reliably on a server Mac that almost never has anyone sitting at it. This has been happening since at least February (SD 3.1.4); previously it was 100% reliable.
Typically what will happen is that I'll connect to the Mac via Remote Desktop to look at something, and I find SuperDuper! will be running but the copy will start immediately after I connect.
You can see how the schedule ends up running way late (it's supposed to be nightly at 3 AM), and my Energy Saver and screen lock settings as attached.
SD! failure.jpg
SD! failure Security & Privacy.jpg