Also, when I have a selected cell and click on another one, the borders don't draw correct again and I want to get rid of the back color for the previously selected cell. How do I do that?

Also, there's another weird bug. When I click on a cell that is editable, a rect is drawn in the upper left corner of the grid on top of the column headers for a short period of time.

EDIT: Actually, this doesn't happen only with editable cells but whenever I click on the top left cell. Then a rect is drawn above the column headers

        virtual public void OnEndPaint(CellDrawInfo info)
        {
            if (allowCellSelect)
            {
                Columns cols = info.grid.Columns;
                if (this.Selected && cols.CurrentColumn == info.col)
                {
                    using (Pen pen = new Pen(Color.Yellow, 1))
                    {
                        Rectangle cell = info.cellRect;
                        if ((info.grid.FlyGrid.Options & GridOptions.ShowHorzLines) != 0)
                        {
                            cell.Height -= info.grid.FlyGrid.LineWidth;
                        }
                        if ((info.grid.FlyGrid.Options & GridOptions.ShowVertLines) != 0)
                        {
                            cell.Width -= info.grid.FlyGrid.LineWidth;
                        }
                        Console.WriteLine(cell.ToString());
                        info.g.DrawRectangle(pen, cell);
                    }
                }
            }

            //clear custom info
            info.customForeColor = Color.Empty;
            info.customBackColor = Color.Empty;
            info.Font = null;
        }

{X=0,Y=0,Width=74,Height=13}
{X=0,Y=0,Width=74,Height=13}
{X=21,Y=19,Width=26,Height=13}
{X=21,Y=19,Width=26,Height=13}

why is it drawing a rect at that position at all??