The "Refunds in Range" on a Sales Summary Report identifies refunds that were processed within your report range (for example: "Last Month") for orders that were created within the same range "Last Month".
In this payment breakdown:
The total refunds were $572.80 in Sept
The total refunds in ranger were 372.80 in Sept
The difference being $200
If you look at all the refunds in the Sales Exceptions>Refunds report for "Last Month", a refund for $200 was processed on 9/13/15.
Click on this order to view the Order Details
This order was created on 8/28.
If our report range is "Last Month" and this order was not created "Last Month", it is outside the range, but still contributes to the total refunds processed in the period.
Another scenario to be aware of, is that of a future order that has been refunded after the day it was created.
Example: An order is created today, refunded a week later, and then closed the day after it was refunded. It will only show up in the Sales Exceptions report under "Refunds" if you set the time range filter of the report to cover the entire lifecycle of the ticket. This means if a future ticket is created on 7/15, but is due on 7/22, and is then refunded on 7/21 - you cannot just set the time range to 7/21 in hopes of viewing the Refund in both the Sales Summary report and the Sales Exceptions report. You need to set the time range filter to be 7/15 - 7/22 or "This Month" if you're in the month of July (for this example specifically).