1. Display problem with using multiple Validators in Bootstrap for .Net

I am using Bootstrap in my .Net page and have an email field where I have the following validators:
1. Email required validator
2. Email format validator

But somehow the validation messages do not show up in the same place.
There is a blank space before the second validation message.
Its like the validator is adding a blank space.

But this does not happen with .Net code without bootstrap, where the first validation message available is shown in the first available space.

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Any ideas on how to fix this in Bootstrap?
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                <div class="row">
                    <div class="col label col-xs-12 col-sm-3 col-md-3 col-lg-3 textLabelAlign">
                        <asp:Label ID="lblEmail" runat="server" Text="Email "/>
                        <asp:Label ID="lblEmailRequired" runat="server" Text="*" rel="required" />
                    </div>
                    <div class="col field col-xs-12 col-sm-6 col-md-6 col-lg-6 textBoxAlign">
                        <telerik:RadTextBox RenderMode="Lightweight" runat="server" ID="txtEmail" Width="100%" EmptyMessage="Enter Email" TabIndex="14" MaxLength="128" Font-Size="Medium" />
                    </div>
                    <div class="col field col-xs-0 col-sm-3 col-md-3 col-lg-3">
                        <asp:RequiredFieldValidator ID="rfvEmail" runat="server" ControlToValidate="txtEmail" ErrorMessage="Email is required" rel="error" SetFocusOnError="true" ValidationGroup="vgSubmitRequest" />
                        <asp:RegularExpressionValidator ID="validateEmail" runat="server" ControlToValidate="txtEmail" Text=" " ValidationGroup="vgSubmitRequest" ErrorMessage="Enter valid email address" rel="error" SetFocusOnError="true"
                                                        ValidationExpression="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*" Enabled="true" />

                    </div>
                </div>
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