jQuery Grid Plugin - jqGrid

I'm using jqGrid for the first time replacing datatables but there is a problem when we resize the column of the grid, the drag column line is not in position as we drag the column.

Here is the fiddle

It works fine here but problem in full page where we have 1000px content area.

http://jsfiddle.net/98RD3/2/

Problem here (resize the column)

http://fiddle.jshell.net/98RD3/2/show/

Also can we show the column being resized while we drag the mouse, right now it resize once we drop the click

Any help would be highly appreciated

Thanks