QTableWidget : signal order not the same between mouse clics and key strokes

The signal currentCellChanged/itemSelectionChanged aren't trigger in same order by mouse click and key stroke.

Test code.

#include <QVBoxLayout>
#include <QMainWindow>
#include <QItemDelegate>
#include <QObject>
#include <QEvent>
#include <QWidget>
#include <QKeyEvent>
#include <QMetaObject>
#include <QStyleOptionViewItem>
#include <QModelIndex>
#include <QAbstractItemDelegate>
#include <QMap>
#include <QTableWidget>
#include <QTableWidgetItem>
#include <QApplication>
#include <QMessageBox>

static int ROWS = 10;
static int COLS = 2;
class Table : public QTableWidget
{
Q_OBJECT
public:
Table(QWidget *parent = 0)
: QTableWidget(ROWS, COLS, parent)
{
for (int i=0; i<rowCount(); ++i) {
for (int j=0; j<columnCount(); ++j)

{ setItem(i, j, new QTableWidgetItem); }

}

connect(this, SIGNAL(currentCellChanged(int, int, int, int)),
this, SLOT(on_currentCellChanged(int, int, int, int)));

connect(this, SIGNAL(itemSelectionChanged()),
this, SLOT(on_itemSelectionChanged()));
}

public slots:
void on_currentCellChanged(int currentRow, int currentColumn, int previousRow, int previousColumn)

{ QMessageBox::information(this, "Test", "currentCellChanged"); }

void on_itemSelectionChanged()

{ QMessageBox::information(this, "Test", "itemSelectionChanged"); }

};

#include "main.moc"

int main(int argc, char **argv)
{
QApplication a(argc, argv);
Table w;
w.show();
return a.exec();
}