jQuery Grid Plugin - jqGrid

Hi, 

I am very much new to JQGrid. I tried using the JQGrid in my MVC application. I have encountered an bug in JQGrid, I have also observed that the same behaviour happens in the demo site "/blog/jqgrid/jqgrid.html", the senario is as below

1. Select  "Advanced" from the left tree menu.
2. Select Grid as Subgrid option
3. After the page loads, sort the main grid based on the Inv No
4. Expand the first row and select the row of the subgrid.
5. The selection in subgird happens correctly, but instead of selecting the parent, this selects a different parent.

Please let me know, if there is any fix available for the same.

Thanks in Advance

Regards,

Raj.