The "Total Remaining Amount" shown in the Opportunities grid is summing all remaining amounts for all opportunities in that fund period and that portfolio. E.g., if I have an initial opportunity that has been totally awarded while its renewal opportunity has $5000 left, the initial opportunity also shows $5000 in Total Remaining Amount. In some situations this overall datapoint is helpful, but in many situations we need to view remaining amounts with opportunity-level granularity.