Incorrect sorting by date

[Graham Watson]

In https://my.interserver.net/index.php?choice=none.view_invoices, when I sort by date ascending, I get the following series:

Apr 27, 2016
Apr 27, 2016
Apr 27, 2016
Mar 13, 2017
Mar 13, 2017
Mar 13, 2017
Mar 14, 2017
Mar 14, 2017
Mar 14, 2017
Mar 2, 2017
Mar 14, 2017
Apr 27, 2016
Mar 14, 2017
Mar 27, 2017
Apr 27, 2017
Apr 27, 2017​

When I sort by date descending, I get the following series:

Mar 14, 2017
Mar 14, 2017
Mar 14, 2017
Mar 13, 2017
Mar 13, 2017
Mar 13, 2017
Apr 27, 2016
Apr 27, 2016
Apr 27, 2016
Mar 14, 2017
Mar 2, 2017
Apr 27, 2017
Apr 27, 2017
Mar 27, 2017
Mar 14, 2017
Apr 27, 2016​

 

[Quags]

thanks we are checking it out.