Wrong folder sorting when sorted by an Extention

[pnbpnb]

I created castom columns with an Extention column. At Settnings\View, at "Sorting" section
I selected "Sort directory always by name". When I am sorting by Extenion, folders with an extention
are not sorted by name (see "FreeCommander_v2009.02a"). Is it OK? It supposed to be sorted by name, isn't it?

System: WindowsXP Home SP3
Free Commander v2009.02a



Best Regards

Piotr Boratyn