p:dataTable is not updating - jsf

Question

I have the following code in a xhtml file. After clicking the command button to save, it doesn't:
<p:tab id="bookingTab" title="Booking Information">
<p:panelGrid id="bookingGrid" columns="4">
<f:facet name="header">
#{bundle.CreateOrdrBookingTitle}
</f:facet>
<h:outputLabel value="#{bundle.CreateOrdrBookingLabel_number}"
for="number" />
<p:inputText id="number" value="#{ordrBookingController.selected.number}"
title="#{bundle.CreateOrdrBookingTitle_number}" required="true"
requiredMessage="Please enter Booking Number" />
<h:outputLabel value="#{bundle.CreateOrdrBookingLabel_ponumber}"
for="ponumber" />
<p:inputText id="ponumber"
value="#{ordrBookingController.selected.ponumber}" title="#{bundle.CreateOrdrBookingTitle_ponumber}"
required="true" requiredMessage="Please enter Booking PO Number" />
<h:outputLabel value="#{bundle.CreateOrdrBookingLabel_bookingDate}"
for="date" />
<p:calendar id="bookingDate" readonlyInput="true"
pattern="dd/MM/yyyy HH:mm:ss" value="#{ordrBookingController.selected.bookingDate}"
title="#{ordrBookingController.selected.bookingDate}" required="true"
requiredMessage="Please enter Booking Date">
<f:convertDateTime pattern="dd/MM/yyyy HH:mm:ss" />
</p:calendar>
<h:outputLabel value="#{bundle.CreateOrdrBookingLabel_cost}"
for="cost" />
<p:inputText id="cost" value="#{ordrBookingController.selected.cost}"
title="#{bundle.CreateOrdrBookingTitle_cost}" required="true"
requiredMessage="Please enter Booking Cost" />
<h:outputLabel value="Contact Person" for="contactname" />
<p:inputText id="contactname"
value="#{ordrBookingController.selected.contactName}" title="Contact Name"
required="true" requiredMessage="Please enter Contact Name" />
<h:outputLabel value="Contact Number" for="contactnumber" />
<p:inputText id="contactnumber"
value="#{ordrBookingController.selected.contactNumber}" title="Contact Number"
required="true" requiredMessage="Please enter Contact Number" />
<h:outputLabel value="Comment" for="comment" />
<p:inputTextarea id="comment"
value="#{ordrBookingController.selected.comment}" title="Comment"
required="true" requiredMessage="Please enter a comment" />
<h:outputLabel value="Email List" />
<p:selectCheckboxMenu value="#{ordrBookingController.selectedUsrs}"
id="emailList" label="Select Users to Email" filter="true"
filterMatchMode="startsWith" panelStyle="width:420px" required="true"
requiredMessage="Please supply users that need to be emailed">
<f:selectItems value="#{usrController.itemsAvailableSelectManyEmail}" />
</p:selectCheckboxMenu>
<f:facet name="footer">
<p:commandButton action="#{ordrBookingController.create}"
process="bookingGrid" value="#{bundle.CreateOrdrBookingSaveLink}"
icon="ui-icon-check" ajax="true" immediate="false"
update="bookingTable bookingGrid :bookingForm:messagePanel">
<f:setPropertyActionListener
target="#{ordrBookingController.selected.ordr}" value="#{ordrController.selected}" />
<f:setPropertyActionListener
target="#{ordrBookingController.selected.active}" value="#{true}" />
</p:commandButton>
</f:facet>
</p:panelGrid>
<br></br>
<p:dataTable id="bookingTable"
value="#{ordrController.selected.ordrBookingList}" var="bookingItem"
rowKey="#{bookingItem.id}" paginator="true" rows="10"
filteredValue="#{ordrBookingController.filteredItems}">
<f:facet name="header">
#{bundle.ListOrdrBookingTitle}
</f:facet>
<p:column headerText="#{bundle.ListOrdrBookingTitle_id}"
sortBy="#{bookingItem.id}">
#{bookingItem.id}
</p:column>
<p:column headerText="#{bundle.ListOrdrBookingTitle_number}"
sortBy="#{bookingItem.number}">
#{bookingItem.number}
</p:column>
<p:column headerText="#{bundle.ListOrdrBookingTitle_ponumber}"
sortBy="#{bookingItem.ponumber}">
#{bookingItem.ponumber}
</p:column>
<p:column headerText="#{bundle.ListOrdrBookingTitle_bookingDate}"
sortBy="#{bookingItem.bookingDate}">
<h:outputText value="#{bookingItem.bookingDate}">
<f:convertDateTime pattern="dd/MM/yyyy HH:mm:ss" />
</h:outputText>
</p:column>
<p:column headerText="#{bundle.ListOrdrBookingTitle_cost}"
sortBy="#{bookingItem.cost}">
R
<h:outputText value="#{bookingItem.cost}">
<f:convertNumber pattern="#0.00" />
</h:outputText>
</p:column>
<p:column headerText="Contact" sortBy="#{bookingItem.ponumber}">
#{bookingItem.contactName}
</p:column>
<p:column headerText="Contact Number" sortBy="#{bookingItem.contactNumber}">
#{bookingItem.contactNumber}
</p:column>
<p:column headerText="Comment" sortBy="#{bookingItem.comment}">
#{bookingItem.comment}
</p:column>
<p:column headerText="User" sortBy="#{bookingItem.createUsr}"
rendered="#{bookingItem.createDate == bookingItem.updateDate}">
#{bookingItem.createUsr}
</p:column>
<p:column headerText="Created Date" sortBy="#{bookingItem.createDate}"
rendered="#{bookingItem.createDate == bookingItem.updateDate}">
<h:outputText value="#{bookingItem.createDate}">
<f:convertDateTime pattern="dd/MM/yyyy HH:mm:ss" />
</h:outputText>
</p:column>
<p:column headerText="User" sortBy="#{bookingItem.updateUsr}"
rendered="#{bookingItem.createDate != bookingItem.updateDate}">
#{bookingItem.updateUsr}
</p:column>
<p:column headerText="Update Date" sortBy="#{bookingItem.updateDate}"
rendered="#{bookingItem.createDate != bookingItem.updateDate}">
<h:outputText value="#{bookingItem.updateDate}">
<f:convertDateTime pattern="dd/MM/yyyy HH:mm:ss" />
</h:outputText>
</p:column>
<p:column>
<p:commandButton value="Edit" process="#this" ajax="true"
update=":bookingForm:tabView:bookingGrid" rendered="#{bookingItem.active eq true}">
<f:setPropertyActionListener target="#{ordrBookingController.selected}"
value="#{bookingItem}" />
</p:commandButton>
<p:commandButton action="#{ordrBookingController.create}"
process="#this" value="Cancel" ajax="true" immediate="false"
update="bookingTable :bookingForm:messagePanel" rendered="#{bookingItem.active eq true}">
<f:setPropertyActionListener target="#{ordrBookingController.selected}"
value="#{bookingItem}" />
<f:setPropertyActionListener
target="#{ordrBookingController.selected.active}" value="#{false}" />
</p:commandButton>
</p:column>
</p:dataTable>
</p:tab>
The p:dataTable bookingTable must be update and other listed on the update attribute. The other tables are being updated, but the bookingTable is not. What is it that is wrong here.