Problem with un-selecting numbers for keno game(stumped)

problem Hired a coder from FreeLancer a few month ago to write
Code for a keno game. Can no longer find him.
There are 80 numbers on the keno board.
The numbers are selected by dragging the mouse over the numbers.
this happens no matter which numbers are selected not just the first 5
In the jpg I have selected the first 5 numbers by dragging the mouse.
 The problem arrises when dragging to unselect the numbers.The wrong numbers are displayed in the cells. It works correctly when clicking the indivual cells to unselect them. but dragging displays the problem(see jpg)

this happens no matter which numbers are selected not just the first 5
I think it is inthe following code which is beyond my abilities.

Private Sub DeSelectCurrentBoard()
Dim iRow As Integer, iCol As Integer
    With flexBoardSelector
        If mCurrentBoardIndex > 0 Then
            CellFromIndex mCurrentBoardIndex, iRow, iCol
            .Row = iRow: .Col = iCol
            .CellBackColor = vbWhite
        End If
    End With

End Sub
Private Sub flexKenoBoard_DragOver(Source As Control, X As Single, Y As Single, State As Integer)
Dim OverCentreX As Boolean, OverCentreY As Boolean, ValidMouseOver As Boolean
Dim thisIndex As Integer
With flexKenoBoard
        OverCentreX = Abs(Y - (.RowPos(.MouseRow) + (BOARD_CELL_WIDTH / 2))) < CELL_MOUSE_SENSITIVITY
        OverCentreY = Abs(X - (.ColPos(.MouseCol) + (BOARD_CELL_WIDTH / 2))) < CELL_MOUSE_SENSITIVITY
   
        ValidMouseOver = OverCentreX And OverCentreY
        If ValidMouseOver And mranddonenobet = False Then
            thisIndex = IndexFromCell(flexKenoBoard.MouseRow, flexKenoBoard.MouseCol)
            'Store the card value to available for reuse - KVS - v1.x
            clval = thisIndex
            UpdateNumber IndexFromCell(.MouseRow, .MouseCol), X, Y, False
        End If
    End With
End Sub

Private Sub flexKenoBoard_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
Dim thisIndex As Integer

    If Button = vbLeftButton Then
        thisIndex = IndexFromCell(flexKenoBoard.MouseRow, flexKenoBoard.MouseCol)
        'Store the card value to available for reuse - KVS - v1.x
        clval = thisIndex
        mSelecting = Not KenoNumbers(thisIndex).Selected
        UpdateNumber thisIndex, X, Y, True
    End If
    

End Sub

Private Sub UpdateNumber(pindex As Integer, pX As Single, pY As Single, Optional pInitialiseDrag As Boolean = False)
Dim lRow As Integer, lCol As Integer, lBorderColour As Long, lForeColour As Long
Dim thisImage As StdPicture

    If mCurrentBoardIndex = 0 Then Exit Sub 'Check this KVS
    
    'to check Bet before selecting numbers - KVS - v1.8
'    If KenoBoards(mCurrentBoardIndex).Stake = 0 And KenoBoards(mCurrentBoardIndex).SelectedCount = 0 Then
'         MsgBox "No bet placed"
'         Exit Sub
'    End If
    
    If KenoBoards(mCurrentBoardIndex).SelectedCount = MAX_SELECTIONS And mSelecting Then
        Exit Sub
    End If
    
    If mranddonenobet = True Then
        If mSavedfileIsDirty = False Then
            mNewBetPlaced = True
            mSavedfileIsDirty = True 'To check Save or NOT
            Call Save_tofile_Write_INI
            If mIsDirty = False Then
                mNewBetPlaced = False
                Exit Sub 'User clicked Cancel
            Else
                mranddonenobet = False
                mNewBetPlaced = False
                Call Clear_gridCardStats
                pInitialiseDrag = False
            End If
        End If
    End If
    
    'KVS - v2.9.1
    
    If pInitialiseDrag Then
        flexKenoBoard.Drag vbBeginDrag
    End If
    
    If mSelecting = KenoNumbers(pindex).Selected Then
        'Nothing to do - item is already selected or unselected
    Else
        KenoNumbers(pindex).AssignedLetters = Replace(KenoNumbers(pindex).AssignedLetters, KenoBoards(mCurrentBoardIndex).Letter, vbNullString)
        'Set the selected Char to the variable - KVS - v1.x
        sel_text_val = KenoBoards(mCurrentBoardIndex).Letter
        
        CellFromIndex pindex, lRow, lCol
        
        If mSelecting Then
            lBorderColour = KenoBoards(mCurrentBoardIndex).Colour
            lForeColour = vbWhite
            KenoNumbers(pindex).AssignedLetters = KenoNumbers(pindex).AssignedLetters & KenoBoards(mCurrentBoardIndex).Letter
            KenoBoards(mCurrentBoardIndex).SelectedCount = KenoBoards(mCurrentBoardIndex).SelectedCount + 1
            Set thisImage = imgBlueSpot.Picture
            'As user have to make bet before selecting a number - KVS - v1.8
'            If KenoBoards(mCurrentBoardIndex).Stake = 0 Then
'                cmdBetMore_Click
'            End If
        Else
            lBorderColour = vbWhite
            lForeColour = vbBlack
            KenoBoards(mCurrentBoardIndex).SelectedCount = KenoBoards(mCurrentBoardIndex).SelectedCount - 1
            Set thisImage = imgCellBG.Picture
            'Reset the value back - KVS - v1.x
            flexKenoBoard.Text = clval
        End If
    
        With flexKenoBoard
            .Row = lRow: .Col = lCol
            .RowSel = lRow: .ColSel = lCol
            Set .CellPicture = thisImage
            .Text = clval
            
            'If click, set the text to selected Char - KVS - v1.x
            If mSelecting Then .Text = sel_text_val
            .CellBackColor = lBorderColour
            .CellForeColor = lForeColour
        End With
        
        KenoNumbers(pindex).Selected = mSelecting
        flexStatus.TextMatrix(KenoBoards(mCurrentBoardIndex).Index, 2) = IIf(KenoBoards(mCurrentBoardIndex).SelectedCount > 0, KenoBoards(mCurrentBoardIndex).SelectedCount, vbNullString)
        'To load flexonecard when clicking the letter for which numbers are selected already - KVS - V1.6
            If FlexOneCard.Visible = True And flexStatus.TextMatrix(KenoBoards(mCurrentBoardIndex).Index, 1) <> "" Then
                Call flexoncecard_upd(flexStatus.TextMatrix(KenoBoards(mCurrentBoardIndex).Index, 1), mCurrentBoardIndex, KenoBoards(mCurrentBoardIndex).SelectedCount)
                'lblRuns.Caption = 0 'KVS - v2.6
                gridCardStats.TextMatrix(5, 1) = 0
            End If
         PlaySoundData SoundSelect(0), 0, SND_MEMORY Or SND_ASYNC Or SND_NODEFAULT
    End If
    
    If getCardCountSelected >= 2 Then
        Call ShowOneCard
    Else
        'Its showing ALL flex grid while selcting the numbers for the first letter - KVS - V1.6
        'Call ShowAllCards
        'Added to show flexgrip for single card selection - KVS - V1.6
        Call ShowOneCard
    End If
    Call DisplayCardsPlayed
End Sub

Private Function getCardCountSelected() As Integer
    Dim i As Integer
    Dim lCount As Integer
    
    lCount = 0
    For i = 1 To 20
        If KenoBoards(i).SelectedCount > 0 Then
            lCount = lCount + 1
        End If
    Next i

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