I don't think we allow the accounting date to differ from the document date...not sure where to verify this but when I run the ATB I don't have the option to choose Calculate as of Accounting Date vs Document Date, so the date I'm running it is for September 30, 2014 which is the same date used for the adjustment. And looking in the AR control account I can see that it was posted to the correct period for September 2014. It just is not calculating into the ATB

Looking at the Adjustment transaction in Receivables I can confirm that I did not use the AR control account as the offsetting side to the transaction (I have done that before though, learned from my mistake).