RadNumeric Input Postback style change

[Dan]

I'm having difficulty understanding why some controls are changing style after a postback.  Namely I have a couple RadNumeric controls with spinners.  At first load they look and behave as expected.  After postback, the style changes somewhat dramatically.  Whether or not I use Bootstrap styling the issue persists.  I can someone get around it by rolling my own style with !important tags on everything, but seems like a kludge.  Any idea of what's going on?  Below is code from page that is in question.

 

<asp:Content ID="Content1" ContentPlaceHolderID="MainContent" runat="server">
    <telerik:RadAjaxManager runat="server">
        <AjaxSettings>
            <telerik:AjaxSetting AjaxControlID="ddlProduct">
                <UpdatedControls>
                    <telerik:AjaxUpdatedControl ControlID="ddlProduct" LoadingPanelID="RadAjaxLoadingPanel1" />
                </UpdatedControls>
            </telerik:AjaxSetting>
            <telerik:AjaxSetting>
                <UpdatedControls>
                    <telerik:AjaxUpdatedControl ControlID="pnl" />
                </UpdatedControls>
            </telerik:AjaxSetting>
            <telerik:AjaxSetting AjaxControlID="RadGrid1">
                <UpdatedControls>
                    <telerik:AjaxUpdatedControl ControlID="RadGrid1" LoadingPanelID="RadAjaxLoadingPanel1" />
                </UpdatedControls>
            </telerik:AjaxSetting>
        </AjaxSettings>
    </telerik:RadAjaxManager>
    <telerik:RadAjaxLoadingPanel runat="server" ID="RadAjaxLoadingPanel1" />
    <telerik:RadFormDecorator RenderMode="Lightweight" ID="RadFormDecorator1" runat="server" DecorationZoneID="grid" DecoratedControls="All" EnableRoundedCorners="false" />

    <h3>Build Plan</h3>
    <br />

        <asp:Panel ID="pnl" runat="server">
        <div class="row">
            <div class="col-md-1">
                <telerik:RadLabel Text="Product" runat="server" CssClass="pull-right" />
            </div>
            <div class="col-md-2">
                <telerik:RadDropDownList ID="ddlProduct" runat="server" CssClass="pull-left" Width="150" Height="30">
                    <Items>
                        <telerik:DropDownListItem Text="Whitney" Value="3" />
                        <telerik:DropDownListItem Text="Lhotse" Value="4" />
                    </Items>
                </telerik:RadDropDownList>
            </div>
            <div class="col-md-2">
                <telerik:RadNumericTextBox RenderMode="Lightweight" ShowSpinButtons="true" IncrementSettings-InterceptArrowKeys="true" IncrementSettings-InterceptMouseWheel="true"
                    runat="server" ID="txtYear" Width="120" Height="30" MinValue="2016" MaxValue="2050" NumberFormat-DecimalDigits="0" NumberFormat-GroupSeparator="" CssClass="" Label="Year">
                </telerik:RadNumericTextBox>
            </div>
            <div class="col-md-2">
                <telerik:RadNumericTextBox RenderMode="Lightweight" ShowSpinButtons="true" IncrementSettings-InterceptArrowKeys="true" IncrementSettings-InterceptMouseWheel="true"
                    runat="server" ID="txtWeek" Width="120" Height="30" MinValue="1" MaxValue="53" NumberFormat-DecimalDigits="0" Label="Week">
                </telerik:RadNumericTextBox>
            </div>
            <div class="col-md-2">
                <telerik:RadButton runat="server" ID="btnGo" class="btn btn-default" Height="30" Text="Go" OnClick="btnGo_Click" />
            </div>

        </div>
        <br />

        <div id="grid">
            <telerik:RadGrid RenderMode="Lightweight" ID="RadGrid1" GridLines="None" runat="server" Width="55%"
                AllowAutomaticInserts="True" PageSize="10" OnItemUpdated="RadGrid1_ItemUpdated" OnPreRender="RadGrid1_PreRender" AllowAutomaticUpdates="True" AllowPaging="True"
                AutoGenerateColumns="False" OnBatchEditCommand="RadGrid1_BatchEditCommand" OnCancelCommand="RadGrid1_CancelCommand">
                <MasterTableView CommandItemDisplay="TopAndBottom" DataKeyNames="BuildPlanId"
                    HorizontalAlign="NotSet" EditMode="Batch" AutoGenerateColumns="False">
                    <BatchEditingSettings EditType="Cell" />
                    <CommandItemSettings ShowAddNewRecordButton="false" />
                    <NoRecordsTemplate>
                        <div>
                            <p class="alert-danger">   There are no records to display</p>
                        </div>
                    </NoRecordsTemplate>
                    <Columns>
                        <telerik:GridBoundColumn DataField="BuildPlanId" HeaderText="Product" Visible="false" UniqueName="BuildPlanId" />
                        <telerik:GridBoundColumn DataField="Product" HeaderStyle-Width="12%" HeaderText="Product" ReadOnly="true" UniqueName="Product" />
                        <telerik:GridBoundColumn DataField="Area" HeaderStyle-Width="15%" HeaderText="Area" ReadOnly="true" UniqueName="Area" />
                        <telerik:GridBoundColumn DataField="Day" HeaderStyle-Width="12%" HeaderText="Day" ReadOnly="true" UniqueName="Day" />
                        <telerik:GridBoundColumn DataField="Date" HeaderStyle-Width="12%" HeaderText="Date" ReadOnly="true" UniqueName="Date" DataFormatString="{0: MM/dd/yyyy}" />
                        <telerik:GridTemplateColumn DataField="Quantity" HeaderStyle-Width="10%" UniqueName="Quantity" HeaderText="Quantity">
                            <ItemTemplate>
                                <%# Eval("Quantity") %>
                            </ItemTemplate>
                            <EditItemTemplate>
                                <telerik:RadNumericTextBox ID="txtQty" runat="server" MinValue="1" MaxValue="300" ShowSpinButtons="true" Width="80" NumberFormat-DecimalDigits="0" NumberFormat-GroupSeparator="" />
                            </EditItemTemplate>
                        </telerik:GridTemplateColumn>
                        <telerik:GridBoundColumn DataField="Shift" HeaderStyle-Width="10%" HeaderText="Shift" Visible="false" UniqueName="Shift" />
                    </Columns>
                </MasterTableView>
                <ClientSettings AllowKeyboardNavigation="true"></ClientSettings>
            </telerik:RadGrid>
        </div>
    </asp:Panel>
</asp:Content>

[Dan]

Really?  No one has an idea or has run into this before?  No administrators either?