jQuery Grid Plugin - jqGrid

I am trying to set up a website that works on a campaign mentality allowing the user to select items from one grid to populate a second grid.  The second grid is the list of people targetted in this campaign.  I have set up drag and drop between them (which is very nice).  The part that I am having issues with is seting up a button to move all items from one grid to another.  Below is the code for each button.  I am using version 3.6.  What happens (when the move down button is pushed) is that all but one of the items from the first grid is moved down to the second grid, with the addition of a blank row.  When the move up is pushed, it moves all up including the blank row.  Pushing the move down button again, moves all 6 rows and the extra blank row down. 

Any ideas?

$('#campaign-moveup').click(function() {
    var RowList;
RowList = $(”#grid2″).getRowData();
var Row;
for( Row in RowList )
{
 $(”#grid1″).addRowData(Row,$(”#grid2″).getRowData(Row));
 $(”#grid2″).delRowData(Row);
}
})
$('#campaign-movedown').click(function() {
    var RowList;
RowList = $(”#grid1″).getRowData();
var Row;
for( Row in RowList )
{
 $(”#grid2″).addRowData(Row,$(”#grid1″).getRowData(Row));
 $(”#grid1″).delRowData(Row);
}
})