sort dont'work virtue mart 2.0.26

[VlaKur]

virtuemart at demo page, I guess the latest version of 2.0.26 sort dont'work. several times changing the sort, and it stops working. in attachment a picture is worth sorting by name, but it is seen as not working

demo page
http://demo.virtuemart.net/index.php/2012-01-13-09-33-20/virtuemart-category-layout

[attachment cleanup by admin]