Why is my PagedDataSource looping to the first elements of the DataSet?

[Rob Fine]

I have a Repeater that forms panels with a left float in order to create a grid. My client only wants to show 12 elements per page, then have page numbers at the bottom of the page.

It would appear that everything is working, except I have an issue in that on the last page, if there aren't 12 elements, it loops back to the begining and shows the first elements again.

So if I have 20 elements total, the first 4 elements will be shown both at the top row of the first page and the last row of the second page.

Has anyone else ever seen this? Or can anyone otherwise assist me in having the repeater not loop to the first elements of the dataset?

Here's my code:
[PAGE CODE]

<asp:Repeater ID="repeat_Gallery"  runat="server">
  <HeaderTemplate></HeaderTemplate>
  <ItemTemplate>
    <div style="float: left; width: 150px;"><%#Container.DataItem("myElementName")%></div>
  </ItemTemplate>
  <FooterTemplate>
    <div style="clear: both;"></div>
  </FooterTemplate>
</asp:Repeater>

[CODE BEHIND]

Public Property PageNumber() As Integer
  Get
    If ViewState("PageNumber") Is Nothing Then
      Return 0
    Else
      Return Convert.ToInt32(ViewState("PageNumber"))
    End If
  End Get
  Set(ByVal value As Integer)
    ViewState("PageNumber") = value
  End Set
End Property

Public Sub GenerateElementsToRepeater()
  'Pull Elements from Database
  Dim dataAdapt As New System.Data.SqlClient.SqlDataAdapter(sql, con)

  'Fill DataSet with Art
  dataAdapt.Fill(_ds)

  'Fill PagedDataSource with Dataset
  _pds.DataSource = _ds.Tables(0).DefaultView()
  _pds.AllowPaging = True
  _pds.PageSize = _PageSize
  _pds.CurrentPageIndex = PageNumber

  'Bind to Repeater
  repeat_Gallery.DataSource = _pds
  repeat_Gallery.DataBind()
End Sub