Funny behavior with Item Editors

Question

I have a DataGrid which has a column with CheckBoxes (item
editors), initially they are all unselected (suppose there are 5
rows), if i click on the 5 of them quickly to change them to
selected then something funny happens, some of them change to
selected and then to unselected again. If i do this slowly, then it
works fine. And the same happens if they are all selected and then
i quickly click on the 5 of them to unselect them, some of them
became selected again.
It is as if Flex wasn't able to process the changes so fast,
so by the time it is processing a CheckBox's change another one
changes too and it reverts the first one to its previous state.
Any idea why this happens? is it a bug, a mistake in my code,
a normal behavior? what is it?

Answer 1

Code:
<mx:DataGrid id="dgcatalogo" width="100%" editable="true"
height="236" dataProvider="{arrCCostoDisplay}" >
<mx:columns>
<mx:DataGridColumn dataField="ccoEstatus"
headerText="{resource.getString('incluir')}" width="50"
editable="true" rendererIsEditor="true"
itemRenderer="renderer.CheckRenderer"
editorDataField="result"/>
<mx:DataGridColumn dataField="ccoDescripcion"
headerText="{resource.getString('descripcion')}" editable="false"
width="200"/>
</mx2:columns>
</mx:DataGrid>
where CheckRender is:
<mx:VBox xmlns:mx="
http://www.adobe.com/2006/mxml"
horizontalAlign="center">
<mx:Script>
<![CDATA[
// Define a property for returning the new value to the
cell.
public var result : Boolean = false;
]]>
</mx:Script>
<mx:Binding source="editor.selected" destination="result"
/>
<mx:CheckBox id="editor"
selected="{data.ccoEstatus}"/>
</mx:VBox>
That's the code, and like i said, it behaves funny when you
select/unselect the checkboxes quickly