RequiredFieldValidator is not Valid even if there is values - asp.net

Question

I have a Page Fruit that has a UpdatePanel P1 and a ModalWIndow (outside of the updatepanel). I have a Page Apple with An UpdatePanel P2. ModalWindow on Page fruit will add Page Apple on demand.
Now, In the Apple Page
I have a GridView with EditItemTemplate and FooterItemtemplate for lets say 5 columns. Both of them have RegularExpressionValidator and RequiredFieldValidtor each separated by ValidationGroup. For EditItemTemplate everything is on point.
For FooterItemTemplate, the button won't do postback even though all the validation is met.
The footer template looks like this for the column of interest
<FooterTemplate>
<asp:TextBox ID="vendorAdd" runat="server" Width="95%"/>
<asp:RegularExpressionValidator ID="RegularExpressionValidator66" ControlToValidate="vendorAdd" ValidationGroup="AddValidation"
ValidationExpression="\w*" runat="server" ErrorMessage="Invalid VendorName" />
<asp:RequiredFieldValidator id = "RegularExpressionValidator67" ValidationGroup="AddValidation" ControlToValidate="vendorAdd"
runat="server" ErrorMessage="VendorName Required" />
</FooterTemplate>
There is no message saying this failed. I removed the all the other validation on other footer column than shown above. I added on the button to stop validation. And in Server side added this
Page.Validate("AddValidation");
var b = Page.IsValid;
var notValidValidators = Page.Validators.Cast<IValidator>().Where(v => !v.IsValid);`
Here in the debugger the notValidValidator says that RequiredFieldValidator is not Valid. I don't see why though, I have a value and there is no message on the front end.
Update Panel on Apple Page full Code is below
<asp:UpdatePanel ID="ackPanel" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:GridView ID="ackedItems" runat="server" Width="720" Visible="true" DataKeyNames="AckId" RowStyle-Height="10px"
AutoGenerateColumns="False" BorderStyle="Dotted" BorderWidth="1px" CellPadding="2"
BackColor="White" BorderColor="#CCCCCC" HorizontalAlign="Left" AllowPaging="false"
ShowFooter="true" OnRowUpdating="AckedItems_RowUpdating" OnRowDeleting="AckedItems_RowDeleting"
OnRowEditing="AckedItems_RowEditing" OnRowCommand="AckedItems_RowCommand" OnRowDataBound="AckedItems_RowDataBound">
<RowStyle ForeColor="#000066" Font-Size="8pt" />
<HeaderStyle ForeColor="#336699" Font-Size="8pt" CssClass="GridViewHeader" Height="20px" />
<AlternatingRowStyle CssClass="GridViewAltStyle" />
<Columns >
<asp:BoundField DataField="AckId" ReadOnly="true" Visible="false" />
<asp:TemplateField HeaderText="Vendor" HeaderStyle-Width="10%">
<ItemTemplate>
<asp:Label ID="vendor" runat="server" Text='<%# Bind("VendorName") %>' Width="95%"/>
</ItemTemplate>
<EditItemTemplate >
<asp:TextBox ID="vendorEdit" runat="server" Text='<%# Bind("VendorName") %>' Width="95%"/>
<asp:RegularExpressionValidator ID="RegularExpressionValidator1" ControlToValidate="vendorEdit" ValidationGroup="EditValidation"
ValidationExpression="\w*" runat="server" ErrorMessage="Invalid VendorName" />
<asp:RequiredFieldValidator id = "Ab" ValidationGroup="EditValidation" ControlToValidate="vendorEdit"
runat="server" ErrorMessage="VendorName Required" />
</EditItemTemplate>
<FooterTemplate>
<asp:TextBox ID="vendorAdd" runat="server" Width="95%"/>
<asp:RegularExpressionValidator ID="RegularExpressionValidator66" ControlToValidate="vendorAdd" ValidationGroup="AddValidation"
ValidationExpression="\w*" runat="server" ErrorMessage="Invalid VendorName" />
<asp:RequiredFieldValidator id = "RegularExpressionValidator67" ValidationGroup="AddValidation" ControlToValidate="vendorAdd"
runat="server" ErrorMessage="VendorName Required" />
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Amount" HeaderStyle-Width="10px">
<ItemTemplate>
<asp:Label ID="amount" DataFormatString = "{0:C2}" runat="server" Text='<%# Bind("Amount") %>' Width="95%" />
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="amountEdit" runat="server" Text='<%# Bind("Amount") %>' Width="95%"/>
<asp:RegularExpressionValidator ID="RegularExpressionValidator3" ControlToValidate="amountEdit" ValidationGroup="EditValidation"
ValidationExpression="\d*(\.\d*)?" runat="server" ErrorMessage="Invalid Amount" />
<asp:RequiredFieldValidator ID="RequiredFieldValidator3" ValidationGroup="EditValidation" ControlToValidate="amountEdit"
runat="server" ErrorMessage="Amount Required" />
</EditItemTemplate>
<FooterTemplate >
<asp:TextBox ID="amountAdd" runat="server"
Width="95%" />
<asp:RegularExpressionValidator ID="RegularExpressionValidator4" ControlToValidate="amountAdd" ValidationGroup="AddValidation"
ValidationExpression="\d*(\.\d*)?" runat="server" ErrorMessage="Invalid Amount" />
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Type">
<ItemTemplate>
<asp:Label ID="type" runat="server" Text='<%# Bind("Type") %>' Width="95%" />
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="typeEdit" runat="server" Text='<%# Bind("Type") %>' Width="95%" />
<asp:RegularExpressionValidator ID="RegularExpressionValidator5" ControlToValidate="typeEdit" ValidationGroup="EditValidation"
ValidationExpression="\w*" runat="server" ErrorMessage="Invalid Type" />
<asp:RequiredFieldValidator ID="RequiredFieldValidator5" ValidationGroup="EditValidation" ControlToValidate="typeEdit"
runat="server" ErrorMessage="Type Required" />
</EditItemTemplate>
<FooterTemplate>
<asp:TextBox ID="typeAdd" runat="server" Width="95%" />
<asp:RegularExpressionValidator ID="RegularExpressionValidator2" ControlToValidate="typeAdd"
ValidationGroup="AddValidation" ValidationExpression="\w*" runat="server" ErrorMessage="Invalid Type" />
</FooterTemplate>
</asp:TemplateField>
<asp:BoundField DataField="ProgNum" ReadOnly="true" HeaderText="ProgNum" ControlStyle-Width="95%" />
<asp:TemplateField HeaderText="AckDate">
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%#Convert.ToDateTime(Eval("AckDate")).ToString("MM/dd/yyyy") %>' Width="95%"/>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Notes" >
<ItemTemplate>
<asp:Label ID="notes" runat="server" Text='<%# Bind("Notes") %>' Width="95%" />
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="notesEdit" Text='<%# Bind("Notes") %>' runat="server" Width="95%"/>
</EditItemTemplate>
<FooterTemplate>
<asp:TextBox ID="notesAdd" runat="server" Width="95
%" />
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="ActivityDate">
<ItemTemplate>
<asp:Label ID="activityDate" runat="server" Text='<%#Convert.ToDateTime(Eval("activityDate")).ToString("MM/dd/yyyy") %>' Width="95%" />
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="activityDateEdit" Text='<%#Convert.ToDateTime(Eval("activityDate")).ToString("MM/dd/yyyy") %>' runat="server" CssClass="date" Width="95%" />
<asp:CompareValidator ID="CompareValidator1" runat="server" Type="Date" Operator="DataTypeCheck" ValidationGroup="EditValidation"
ControlToValidate="activityDateEdit" ErrorMessage="Invalid Date" />
<asp:RequiredFieldValidator ID="RequiredFieldValidator7" ValidationGroup="EditValidation" ControlToValidate="activityDateEdit"
runat="server" ErrorMessage="Date Required" />
</EditItemTemplate>
<FooterTemplate>
<asp:TextBox ID="activityDateAdd" runat="server" CssClass="date" Width="95%"/>
<asp:CompareValidator ID="CompareValidator2" runat="server" Type="Date" Operator="DataTypeCheck" ValidationGroup="AddValidation"
ControlToValidate="activityDateAdd" ErrorMessage="Invalid Date" />
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="IsVoid">
<ItemTemplate>
<asp:CheckBox ID="isVoid" runat="server" Checked='<%# Eval("IsVoid") %>' Width="95%" />
</ItemTemplate>
<EditItemTemplate>
<asp:CheckBox ID="isVoidEdit" runat="server" Checked='<%# Eval("IsVoid") %>' Width="95%" />
</EditItemTemplate>
<FooterTemplate>
<asp:CheckBox ID="isVoidAdd" runat="server" Width="95%" />
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="VoidReason">
<ItemTemplate>
<asp:Label ID="voidReason" runat="server" Text='<%# Bind("VoidReason") %>' Width="95%" />
</ItemTemplate>
<EditItemTemplate>
<asp:DropDownList ID="voidReasonEdit" runat="server" Width="95%" />
</EditItemTemplate>
<FooterTemplate>
<asp:DropDownList ID="voidReasonAdd" runat="server" Width="95%" />
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField>
<ItemStyle HorizontalAlign="Center" />
<ItemTemplate>
<asp:LinkButton ID="lbEdit" runat="server" CausesValidation="false" CommandName="Edit"
Text="<img border=0 src=../Theme/Main/Images/edit.gif alt=Edit>" />
<asp:LinkButton ID="lbDelete" runat="server" CausesValidation="false" CommandName="Delete"
OnClientClick="if(!confirm('Do You Really want to Delete this Order Item?')) return false;"
Text="<img border=0 src=../Theme/Main/Images/delete.gif alt=Delete>" />
</ItemTemplate>
<EditItemTemplate>
<asp:LinkButton ID="lbAdd" runat="server" CausesValidation="true" CommandName="Update"
ValidationGroup="EditValidation" Text="<img border=0 src=../Theme/Main/Images/check.gif alt=Update>" />
<asp:LinkButton ID="lbDelete" runat="server" CausesValidation="false" CommandName="Cancel"
Text="<img border=0 src=../Theme/Main/Images/delete.gif alt=Cancel>" />
</EditItemTemplate>
<FooterStyle HorizontalAlign="Center" VerticalAlign="Top" />
<FooterTemplate>
<asp:LinkButton ID="lbAdd" runat="server" CausesValidation="false" CommandName="Add"
ValidationGroup="AddValidation" Text="<img border=0 src=../Theme/Main/Images/check.gif alt=Add>" />
<asp:LinkButton ID="lbDelete" runat="server" CausesValidation="false" CommandName="Cancel"
Text="<img border=0 src=../Theme/Main/Images/delete.gif alt=Cancel>" />
</FooterTemplate>
</asp:TemplateField>
</Columns>
<EmptyDataTemplate>
<asp:TextBox ID="vendorEdit" runat="server" Text='<%# Bind("Vendor") %>' CssClass="InputTextBox"
Width="100px" />
</EmptyDataTemplate>
</asp:GridView>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="lbEdit" EventName="Click" />
</Triggers>
</asp:UpdatePanel>