Bug : Batch editing changed mark disappear

[Balajti]

To produce the bugs:

Edit a cell value then the red mark appeared.
Edit another, the mark is on both cells.
Click on the first cell, not modify just click the 3rd cell, and the modified mark is disappeared. ( but the cell still modified from the zero state )

Edit a cell value then the red mark appeared.
Insert a new row, and the mark is disappeared too.

Sorry my English is bad.

István