jQuery Grid Plugin - jqGrid

I'm testing jqGrid - it's a very good tool.

While testing I found that thing:

my test data with 1 record (one line in a table) - still had able to sort colums (it's OK), but while I pressing sort button (in header of column) - script send query for PHP backend. Why?

Every time I press 'Sorting' I load same data from server, so I only waste resources on server.

IMHO it'll be better not to send useless query when tab had 1 line data.

thank you.