jQuery Grid Plugin - jqGrid

HI,

I'm having trouble Form Editing.  I use the "navGrid" which pops up a form for the row that I selected.  I press submit and the server saves the data and posts back a good response.  Then I click the "X" to close the form.

However, now the grid is behaving strange.  When I click on another row, it is highlighted but the first row stays highlighted as well.  It looks like the grid changes to multi select...

1) Does anyone know why this happens?
2) What are the fields in the return array?  (what does [false, "Message", ""] mean?

Here is my function that is fired after the "afterSubmit" event:

     function checksave(serverStatus, aPostData)
     {
        var jsonText = serverStatus.responseText;
        var mydata = eval('(' + jsonText + ')');

        if (mydata.status == "False")
        {
            return [false, mydata.status, ""];
        }
        else
        {
            return [true, "", ""];
        }
    }