Listview scrolling problem

So I have this function

Func FunPopulateListView($parse)
;GUICtrlCreateListViewItem("1|2|3|4|5|6|7|8|9|10",$mainlist)
$i = 1

While $Parse[$i] <> ""
$split = StringSplit($Parse[$i], "|")
$split2 = StringSplit($split[4],",")
Select

Case GUICtrlRead($childchkct) = 1 And $split2[1] = "CT"
	GUICtrlCreateListViewItem($Parse[$i],$mainlist)
Case GUICtrlRead($childchkct) = 1 And $split2[2] = "CT"
	GUICtrlCreateListViewItem($Parse[$i],$mainlist)
Case GUICtrlRead($childchkct) = 1 And $split2[3] = "CT"
	GUICtrlCreateListViewItem($Parse[$i],$mainlist)
Case GUICtrlRead($childchkct) = 1 And $split2[4] = "CT"
	GUICtrlCreateListViewItem($Parse[$i],$mainlist)
Case GUICtrlRead($childchkct) = 1 And $split2[5] = "CT"
	GUICtrlCreateListViewItem($Parse[$i],$mainlist)
Case GUICtrlRead($childchkmr) = 1 And $split2[1] = "MR"
	GUICtrlCreateListViewItem($Parse[$i],$mainlist)
Case GUICtrlRead($childchkmr) = 1 And $split2[2] = "MR"
	GUICtrlCreateListViewItem($Parse[$i],$mainlist)
Case GUICtrlRead($childchkmr) = 1 And $split2[3] = "MR"
	GUICtrlCreateListViewItem($Parse[$i],$mainlist)
Case GUICtrlRead($childchkmr) = 1 And $split2[4] = "MR"
	GUICtrlCreateListViewItem($Parse[$i],$mainlist)
Case GUICtrlRead($childchkmr) = 1 And $split2[5] = "MR"
	GUICtrlCreateListViewItem($Parse[$i],$mainlist)	
Case GUICtrlRead($childchkus) = 1 And $split2[1] = "US"
	GUICtrlCreateListViewItem($Parse[$i],$mainlist)
Case GUICtrlRead($childchkus) = 1 And $split2[2] = "US"
	GUICtrlCreateListViewItem($Parse[$i],$mainlist)
Case GUICtrlRead($childchkus) = 1 And $split2[3] = "US"
	GUICtrlCreateListViewItem($Parse[$i],$mainlist)
Case GUICtrlRead($childchkus) = 1 And $split2[4] = "US"
	GUICtrlCreateListViewItem($Parse[$i],$mainlist)
Case GUICtrlRead($childchkus) = 1 And $split2[5] = "US"
	GUICtrlCreateListViewItem($Parse[$i],$mainlist)	
Case GUICtrlRead($childchkxr) = 1 And $split2[1] = "XR"
	GUICtrlCreateListViewItem($Parse[$i],$mainlist)
Case GUICtrlRead($childchkxr) = 1 And $split2[2] = "XR"
	GUICtrlCreateListViewItem($Parse[$i],$mainlist)
Case GUICtrlRead($childchkxr) = 1 And $split2[3] = "XR"
	GUICtrlCreateListViewItem($Parse[$i],$mainlist)
Case GUICtrlRead($childchkxr) = 1 And $split2[4] = "XR"
	GUICtrlCreateListViewItem($Parse[$i],$mainlist)
Case GUICtrlRead($childchkxr) = 1 And $split2[5] = "XR"
	GUICtrlCreateListViewItem($Parse[$i],$mainlist)	
	
EndSelect
$i = $i + 1

WEnd
EndFunc

That populates a list view that is declared with

;List
Local $iExWindowStyle = BitOR($WS_EX_DLGMODALFRAME, $WS_EX_CLIENTEDGE)
Local $iExListViewStyle = BitOR($LVS_EX_FULLROWSELECT, $LVS_EX_SUBITEMIMAGES, $LVS_EX_GRIDLINES, $LVS_EX_DOUBLEBUFFER)
Global $mainlist = GUICtrlCreateListView("", 10, 90, $screenwidth - 20, $screenheight - 200, $iExWindowStyle)
_GUICtrlListView_SetExtendedListViewStyle($mainlist, $iExListViewStyle)

; Add column
_GUICtrlListView_AddColumn($mainlist, "Locked", 50)
_GUICtrlListView_AddColumn($mainlist, "Last Name", 200)
_GUICtrlListView_AddColumn($mainlist, "First Name", 200)
_GUICtrlListView_AddColumn($mainlist, "Modality", 100)
_GUICtrlListView_AddColumn($mainlist, "Status", 300)
_GUICtrlListView_AddColumn($mainlist, "Status Time", 100)
_GUICtrlListView_AddColumn($mainlist, "Total Time", 100)
_GUICtrlListView_AddColumn($mainlist, "Beverage", 100)
_GUICtrlListView_AddColumn($mainlist, "Notes", 1000)
_GUICtrlListView_AddColumn($mainlist, "PatientNum", 0)

The thing is my right scroll bar disappears if I don't have at least 1 GUICtrlCreateListViewItem out of the select statement.  If I move GUICtrlCreateListViewItem($Parse[$i],$mainlist) (the exact same line as the select statement) the right scroll bar is there, but once I move it down 2 lines the right scroll bar disappears.  Has anyone seen this before?

Thanks,