My guess is that these numbers are mechanically produced, without human thinking. They take the payment history file, and run it thru a program that computers over the last X months what the statistics were, and then they pop those numbers in.
I agree with you that for future predictive power, the present choices don't make much sense. However, as a practical matter, there are very few loans in the "default" state, 'cause loans don't stay there very long. That's probably why the mechanical process produces a flaky number, but it also means it won't change your account value much.