jQuery Grid Plugin - jqGrid

When trying to display the content of a single cell for each row in a grid, the second row is always ignored and cannot be accessed.

colModel:[{name:'symbol', index:'symbol', width:50},
{name:'last', width:50, sortable:false, align:'right'},
{name:'change', width:50, sortable:false, align:'right'},
{name:'bid', width:50, sortable:false, align:'right'},
{name:'offer', width:50, sortable:false, align:'right'},
{name:'open', width:50, sortable:false, align:'right'},
{name:'high', width:50, sortable:false, align:'right'},
{name:'low', width:50, sortable:false, align:'right'},
{name:'filler', width:11, sortable:false}],   

alert(jQuery("#gridID").getCell(1,"symbol"));
alert(jQuery("#gridID").getCell(2,"symbol"));
alert(jQuery("#gridID").getCell(3,"symbol"));

The first alert correctly displays the content of the symbol field in row 1.

The second alert skips over row 2 and displays the content of symbol field in row 3.

The third alert displays content of symbol field in row 4 etc...