Remove extra graphical resweeps, and smooth prior to despeckling. Was getting odd desync here without Land[] seemingly incorrect at end of passes. Just removing seems to fix, and code wasn't that good an idea in its prior state anyway.
#include <QLabel>
#include <QRect>
#include <QList>
#include <QMouseEvent>
class PixLabel : public QLabel
{
Q_OBJECT
public:
PixLabel();
QList<QRect> rects;
public slots:
void AddRect();
private:
void paintEvent(QPaintEvent * event);
void mousePressEvent(QMouseEvent * e);
};