T&E Approver Amount Mismatch with Expense Report

We are running FSCM9.0, MP13, Oracle 11.1.0.7, PT 8.49.31

We are running into a problem approving expense reports with foreign currency conversions depending on the number of decimal places in the foreign currency.  Occasionally, when the approver brings up the expense report to approve, the report total the approver sees missmatches with the dollar amount on the expense report.  We assume that its to to a re-calculation that is conducted when the approver reviews the expense report.  The amount difference seems to only be a penny or two off when it does mismatch.  This causes the journal to be miscalculate and causes the journal to be reopended and edited