When exporting data from the same column in the Toad result Data Grid into an Excel instance, some dates in the Excel cells are being shown in the wrong format. The two dates shown in Toad using the format:
when exported to Excel the first one is in MM/DD/YYYY the second entry is correct.
Use the Export to an Excel File output when exporting from the Data Grid.
Waiting for fix in a future version of Toad for Oracle.