[dnanian]

Sandbox is described in the User's Guide, so take a read there... sharing works by basically aliasing/symlinking the Home folder and some applications from the orginal volume. Yes, they can get corrupted, but the idea is that you run from the Sandbox when you want to install a system update. It's not a backup!

Schedules do not run when the Mac is sleeping, as explained in the 'guide. You need to set a wake event, using the Energy Saver preference pane, for one minute before the scheduled backup time (1:29am).