My previous request worked using commandbutton save in a custom object.  And it's working just fine.  But using that command in a Standard object doesnt work.  Instead, it reloads the record inside the iFrame and does not save the data.  Is there a difference on them?  How can i fix this?

VISUALFORCE PAGE

<apex:pageBlockButtons >
        <apex:commandButton action="{!Save}" value="Save"/>
        </apex:pageBlockButtons>

<apex:page standardController="Contact" showHeader="false" sidebar="false" extensions="ContactExtensionController">
    <!-- Define Tab panel .css styles -->
    <style>
    .activeTab {background-color: #081f3f; color:white; background-image:none}
    .inactiveTab { background-color: lightgrey; color:black; background-image:none}
    </style>
    

    <!-- Create Tab panel -->
   
    <apex:tabPanel switchType="client" selectedTab="Contact" id="ContacttabPanel"
        tabClass="activeTab" inactiveTabClass="inactiveTab">
        <apex:tab label="Contact Information" name="name" id="Contact">
        <apex:form > 
        <apex:pageBlock >
        <apex:pageblocksection > 

          
    <apex:outputText style="font-size:20px;text-align:left;color:{!IF(Contact.Sales_Status__c = 'Proposal'||Contact.Sales_Status__c='Listing'||Contact.Sales_Status__c='Escrow'||Contact.Sales_Status__c='Sales Comp', 'red', '#081f3f')};" value="{0} | {1}"> 
<apex:param value="{!Contact.Name}"/>
<apex:param value="{!Contact.Sales_Status__c}" />
</apex:outputText>
</apex:pageblocksection>

        <apex:pageBlockButtons >
        <apex:commandLink value="Save" action="{!save}" target="_parent" styleClass="btn" style="text-decoration:none;padding:4px;"></apex:commandlink>
        </apex:pageBlockButtons> 

           <apex:pageBlockSection columns="2">
                <apex:inlineEditSupport event="ondblClick" showOnEdit="saveButton,cancelButton" hideOnEdit="editButton" />
                <apex:pageBlockSectionItem >
                </apex:pageBlockSectionItem>
                <apex:pageBlockSectionItem >
                </apex:pageBlockSectionItem>

                 
                <apex:pageBlockSectionItem >
                <apex:outputLabel value="Company Name" for="Contact.Account" style="font-weight:bold"/>
        <a href="/{!Contact.Account}" target="_blank">{!Contact.Account.name}</a>
                </apex:pageBlockSectionItem>
                
         

                                                <apex:pageBlockSectionItem >
                <apex:outputLabel value="Parent Company" for="Contact.Parent_Company__c" style="font-weight:bold"/>
                    <apex:outputField value="{!Contact.Parent_Company__c}" id="Contact"/>  
                </apex:pageBlockSectionItem>
             
              

                
                                <apex:pageBlockSectionItem >
                <apex:outputLabel value="Confirmed Owner" for="Contact.Confirmed_Owner__c" style="font-weight:bold"/>
                    <apex:outputField value="{!Contact.Confirmed_Owner__c}" id="Contact"/>  
                </apex:pageBlockSectionItem>
  </apex:pageBlock>
  </div>
   </apex:page>
   </apex:tab>     
    </apex:tabPanel>
   
</apex:page>

public class ContactExtensionController{
    Contact Contact;
  //  public String currentUser = UserInfo.getUserId();
    
    public ContactExtensionController(ApexPages.StandardController controller)
    {
        Contact = (Contact)controller.getRecord();
    }
    
    public PageReference save()
    {
        update Contact;
        return null;
    }
}