jQuery Grid Plugin - jqGrid

Maybe i'm wrong, but i'm experiencing inconsistent afterSubmit behaviour using

[jqgrid code].navGrid(
"#pagerid",{add:true,edit:true,del:true,search:false,refresh:false},
                {
                    reloadAfterSubmit:true,
                    closeAfterEdit:true,
                    beforeShowForm:function(){alert("beforeShowForm edit");},
                    afterSubmit:function(r,data){alert('afterSubmit edit');}
                }
                ,
                {
                    reloadAfterSubmit:true,
                    closeAfterAdd:true,
                    beforeShowForm:function(){alert("beforeShowForm new");},
                    afterSubmit:function(r,data){alert('afterSubmit new');}
                }
    );

When i click on the edit button i get as expected

1) alert("beforeShowForm edit");
2) alert('afterSubmit edit');

but when i click on the new button i get

1) alert("beforeShowForm new");
2) alert('afterSubmit edit'); <- i expected an alert('afterSubmit new');

trying the opposite (first hit the new button, than the edit button) you can experience the opposite, this time

1) alert("beforeShowForm new");
2) alert('afterSubmit new');

but when i click on the new button i get

1) alert("beforeShowForm edit");
2) alert('afterSubmit new');

... so to make a long story short, it seems that the once the afterSubmit event is initialized with a function you can't change it ...

Maybe someone of you crashed on this problem before ...

I'm trying it on IE7, windows XP, latest jqgrid release (3.3).

Hope i'm wrong and this is not a bug ...

Cheers

CJ