Ok, what is your device setup? Usb drives, hard drive partitions, etc and how are they getting assigned device names. (HD is sda1, sda2, usb is sdb1, second usb is sdc1, etc). Are the device names attached to different ide or usb changing across reboots? (Normal for Linux, but for some reason prevented in previous dCore releases).
How is the backup not getting restored, not getting untarred, or do scripts in the backup not run, etc?