[Koha-devel] should amountoutstanding approach zero?

I'm looking through Accounts.pm and I see the call to fixcredit() is commented out, and the POD for fixcredit() declares it deprecated. So it seems that amountoutstanding is not adjusted when manual credits are entered. I would rather see amountoutstanding change than that it not change. Are there any comments on this? Am I missing something? Thanks.