PRC: Distribute Supplier Invoice Adjustment Costs and GL Date in AP

I am trying to determine how the GL Date in AP is determined when an expense is changed via projects and then PRC: Distribute Supplier Invoice Adjustment Costs runs.   The scenario we have is that after the calendar month has ended (say May 3rd) but before we close out books for the month AP and GL have April and May open.   On the projects side, only April is open.   If we change an expense line from one project to another on May 3rd, it hits on the Projects side in April.  We run the PRC: Distribute Supplier Invoice Adjustment Costs