How do I fix broken rows of scrolling of listctrl screen

// OnInitDialog() of my VC++ program
// I setup a listctrl variable like this:

<pre>::ZeroMemory(&item, sizeof(item));
	item.mask = LVIF_TEXT;
	item.pszText = _T("");
	item.iItem = 0;
	item.iImage = 0;
	item.state = 0

DWORD dwEXStyle = m_ListCtrl.GetExtendedStyle();
	m_ListCtrl.SetExtendedStyle(dwEXStyle | LVS_EX_GRIDLINES | LVS_EX_FULLROWSELECT | LVS_EX_DOUBLEBUFFER);
	
// And to move data to listctrl,I made one new row by InsertItem.
::ZeroMemory(&item, sizeof(item));

	item.mask = LVIF_TEXT;
	item.pszText = _T("");
	item.iItem = i;
	item.iImage = 0;
	item.state = 0;// LVIS_SELECTED | LVIS_FOCUSED;


	int NewRow = m_List_.InsertItem(&item);

// Next, I move data value to each column by SetItemText like this:
	/* SEQ */
	strTmp = logseq;
	m_ListCtrl.SetItemText(i, 0, strTmp);

        /* Next columns */
        ...
        ...
        ...
// At last, I focus newrow by EnsureVisible...

	m_ListCtrl.EnsureVisible(NewRow, TRUE);

// And every 1000 row, I clear all screen by DeleteAllItems() 
if (row_count_ % 1000 == 0)
	{
		m_ListCtrl.DeleteAllItems();
		row_count_ = 0;
	}