data mining? If you're using regular tools to update like apt
that's basically just your computer downloading files.
I'm not familiar with SystemBack to know what it should & shouldn't do, but this looks like it's launchpad page if you'd like to browse the source code.
There should be a changelog somewhere to see when the last updates were, there could've been a bunch released close together recently.
I think I found it, https://code.launchpad.net/~nemh/systemback/devel does show 5 updates this month, and 5 more in the last 2 days of November.
Or I thought I saw a "daily" branch that likely gets updated more frequently, you could be in too. You might want to switch to the "systemback/stable" branch it seems to have less frequent updates and would hopefully be more stable, but I'm not sure if those are in a Ubuntu PPA.