jQuery Grid Plugin - jqGrid

I have several editable columns in a row.
1) If I start editing in a column & tab to the next ones, every other cell (the even columns) fails to work correctly - the cell stays in edit mode & the value is not saved. I get two ajax calls on the odd cells & none on the even cells.

2) If I edit a cell & use the enter key to complete the edit, it saves correctly but then I get a post-back to the parent page, which forces a grid reload. The page post-back doesn't happen if I use the enter key after having used the tab key on a previous cell.

$("#gTravel").jqGrid({
    caption: "Travel - Year " + year,
    colNames: colNames1,
    colModel: colModel1,
    imgpath: imgPath,
    datatype: "xml",
    height: '100%',
    cellEdit: true,
    cellsubmit: 'remote',
    url:     'HttpRequestPDS.aspx?op=load&pid='+pid+'&yr='+year+'&tab=gTravel',
    cellurl: 'HttpRequestPDS.aspx?op=edit&pid='+pid+'&yr='+year+'&tab=gTravel',
    beforeSubmitCell: function (id,name,v,iRow,iCol){ return {r:id, n:name, v:v}; },
});

A typical col model would be:
name:'Jan',sortable:false,width:45,align:'right',editable:true},

3) I also have a toolbar function to delete a row. If the selrow variable is set by clicking an editable cell, the row is deleted OK (I call the delRowData function if the ajax function succeeds) but it will invoke the cellEdit function on the cell below it with an undefined value.