In TPAM 2.5.915, while viewing the 'Failed Logins Report' and utilizing the option for the 'Sort Direction' of 'Ascending' it does not display the records in the correct order.
Using the option of 'Descending' does return valid results in the expected order.
This has been addressed in the 2.5.917 release of TPAM which can be downloaded here.
From the 2.5.917 Release Notes under the "Resolved Issue" section:
"Ascending date sort order on Failed Logins report does not work. BFER 8517"