1. Ensure the criteria specified on the query includes everything that is specified on the report .
  2. If the report is being run based on a query, ensure the correct query is being used.
  3. Make sure that the query and report are being run for the same record type.  For example, a gift report will not match a constituent query because they are based on different records.
  4. Refer to Reports do not match in Raiser's Edge 7