Sorting EditorGrid problem

[rational]

I'm dealing with an EditorGrid with its ColumnConfigs and his store.
After the grid's been filled, a sorting is applied with the line:

grid.getStore().sort(field, sortDir);

An add button adds a new empty register to the grid's store and an empty row is displayed in the top of the list (because of the SortDir.ASC parameter). I fill the fields of the new row, everything fine.

Second add, second empty row in the top of the list. From this moment if I click over any editable field of the grid, an editor appears in the cell to change its value, as expected, but, and here is the reason of my question, the content loaded into the editor is the text of the row below.

Example:
Code Description
--------------------
(last added row)
AAA aaa
BBB bbb

On clicking the Code cell of the row with AAA, appears the editor with BBB inside.

I've realized that this strange behaviour doesn't appear if the grid is not sorted.

Also say that in other grids, I override the preProcess() and postProcess() functions to work with this value before and after the editor's action. but NOT in this case. I add the editor in this simple way:

TextField<String> textFieldCode = new TextField<String>();
columnConfigCode.setEditor(new CellEditor(textFieldCode));

Is this a bug or am I forgetting something?

Thanks in advance.

[sven]

am I forgetting something?

How can we know this if you have not posted a testcase that implements EntryPoint yet.

[rational]

Sorry if I'm too novice using GXT, but I'm not sure about what you ask for.
The application in which I'm working is quite huge and I'm dealing with a single panel, I can't copy here all the code.

Anyway I thought there could be a concept mistake in my development or maybe a known bug.

How can I expose enough details?

[sven]

How can I expose enough details?

Reproduce it in a simple alone standing example that implements EntryPoint.

[rational]

Partially solved.

I know it may not be the best way to do it, but forcing the ordenation of the grid after adding a new row, the problem dissappears.

String sortField = grid.getStore().getSortField();
SortDir sortDir = grid.getStore().getSortDir();
grid.getStore().sort(sortField, sortDir);

This code is placed in the function executed after the event of adding a row.