R09801 ST Batch Posting Creates a 2nd Currency Exchange Entry

Since upgrading to 9.2 six months ago, our accountants have noticed that for our SI sales orders posting of ST batches, the R09801 creates a second currency exchange entry. Analysis has shown me it is being generated for the difference in exchange rates - from the rate that was attached to the sales order upon creation to the most current rate in F0015. In the F0911, the exchange rate written to the file does not change so you'd never know what this amount is for by looking at the data generated and written to the file.