Sorting by Tracker Status works ... interestingly.
Online!
55 days offline
101 days offline
110 days offline
117 days offline
183 days offline
75 days offline
83 days offline
0 days offline
46 days offline
47 days offline
50 days offline
52 days offline
54 days offline
... ???
The sort code reallllllly doesn't like mixing numbers and letters together for some reason :/
It's a plugin, and I'll have to crack open the lid to see what's going on with it.
If it helps, I noticed that the "jump points" correspond exactly to the color changes:
Online!
55 days offline
101 days offline
110 days offline
117 days offline
183 days offline
75 days offline
83 days offline
0 days offline
46 days offline
47 days offline
50 days offline
52 days offline
54 days offline
[EDIT:] Wait, that still doesn't explain 101/110.
[EDIT AGAIN:] Wait, there is still other stuff messed up. Never mind :P