请教一下，这个GridView怎么点了分页后，格式会变化

<asp:GridView ID="GridView1" runat="server" AllowPaging="True" AutoGenerateColumns="False"
            GridLines="Horizontal" ShowHeader="False" Width="100%" BorderStyle="None" PageSize="18" CellPadding="0" OnPageIndexChanging="GridView1_PageIndexChanging">
            <AlternatingRowStyle BackColor="#53AFFA" BorderStyle="None" />
        <Columns>
            <asp:TemplateField>
                <ItemStyle HorizontalAlign="Center" Width="10%" Wrap="False" />
                <ItemTemplate><%# this.RowIndex++ %></ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField>
                <ItemStyle Width="60%"  Wrap="False" CssClass="GirdOver" HorizontalAlign="Left" />
                <ItemTemplate><div align="left" style="overflow: hidden; text-overflow:ellipsis;width:80%"><a href="ShowBulltion.aspx?Bulltion_Id=<%# Eval("Id") %>"><%# Eval("Title") %></a></div></ItemTemplate>
                <ControlStyle CssClass="GirdOver" />
            </asp:TemplateField>
            <asp:BoundField DataField="Operation_Name">
                <ItemStyle HorizontalAlign="Center" Width="15%" />
            </asp:BoundField>
            <asp:BoundField DataField="Operation_DateTime" DataFormatString="{0:d}" HtmlEncode="False">
                <ItemStyle Height="20px" HorizontalAlign="Center" Width="15%" />
            </asp:BoundField>
        </Columns>
       
        </asp:GridView>
第一页格式显示正常，可点了分页按钮后，格式就乱了，请问该怎么办啊