Dashboard A/P totals not the same as the A/P Aging report

SUGGESTED

When I add up the up the Due in 30 Days, Overdue 1-30 and Overdue >30 columns of the Payables Aging on the dashboard, that total is over $200,000 less than the Current and 1-30 columns total in the AP Invoice Aging report run through 4-3.  The total of these two came to the same number a couple of weeks ago.  Why am I missing so much in the dashboard?