Struts标签set范围问题

struts2.1关于set标签范围测试的,怎么结果都一样啊？？？？<%@ page language="java" pageEncoding="GB18030"%>
<%@ taglib uri="/struts-tags" prefix="s" %><html>
  <head>    
    <title>tags.jsp</title>
  </head>
  
  <body>
    <h1>tags</h1>
        property 取得Action属性的值,值栈中存在:<s:property value="name"/>        property 只是一个字符串:<s:property value="'zifuchuan'"/>        <hr/>
<!--以下是出问题的代码： -->        set：默认
<s:set var="admin" value="name"/>
        <strong>page(admin): </strong><s:property value="admin"/>        <strong>request(#request.admin): </strong><s:property value="#request.admin"/>        <strong>session(#session.admin): </strong><s:property value="#session.admin"/>        <strong>application(#application.admin): </strong><s:property value="#application.admin"/>        <strong>ActionContext(#admin): </strong><s:property value="#admin"/>
<hr/>
        set:(page)
<s:set var="admin" value="name" scope="page"/>
        <strong>page(admin): </strong><s:property value="admin"/>        <strong>request(#request.admin): </strong><s:property value="#request.admin"/>        <strong>session(#session.admin): </strong><s:property value="#session.admin"/>        <strong>application(#application.admin): </strong><s:property value="#application.admin"/>        <strong>ActionContext(#admin): </strong><s:property value="#admin"/>
<hr/>
        set:(request)
<s:set var="admin" value="name" scope="request"/>
        <strong>page(admin): </strong><s:property value="admin"/>        <strong>request(#request.admin): </strong><s:property value="#request.admin"/>        <strong>session(#session.admin): </strong><s:property value="#session.admin"/>        <strong>application(#application.admin): </strong><s:property value="#application.admin"/>        <strong>ActionContext(#admin): </strong><s:property value="#admin"/>
<hr/>
        set:(session)
<s:set var="admin" value="name" scope="session"/>
        <strong>page(admin): </strong><s:property value="admin"/>        <strong>request(#request.admin): </strong><s:property value="#request.admin"/>        <strong>session(#session.admin): </strong><s:property value="#session.admin"/>        <strong>application(#application.admin): </strong><s:property value="#application.admin"/>        <strong>ActionContext(#admin): </strong><s:property value="#admin"/>
<hr/>
                set:(application)
<s:set var="admin" value="name" scope="application"/>
        <strong>page(admin): </strong><s:property value="admin"/>        <strong>request(#request.admin): </strong><s:property value="#request.admin"/>        <strong>session(#session.admin): </strong><s:property value="#session.admin"/>        <strong>application(#application.admin): </strong><s:property value="#application.admin"/>        <strong>ActionContext(#admin): </strong><s:property value="#admin"/>
<hr/>
        <s:debug></s:debug>
  </body>
</html>
struts2.1关于set标签范围测试的，怎么结果都一样啊？？？？每个范围分别测试的结果
set：默认
page(admin): MaYachong
request(#request.admin): MaYachong
session(#session.admin): MaYachong
application(#application.admin): MaYachong
ActionContext(#admin): MaYachong
set:(page)
page(admin): MaYachong
request(#request.admin): MaYachong
session(#session.admin): 
application(#application.admin): MaYachong
ActionContext(#admin): MaYachongset:(request)
page(admin): MaYachong
request(#request.admin): MaYachong
session(#admin): MaYachong
application(#application.admin): MaYachong
ActionContext(#admin): MaYachoengset:(session)
page(admin): MaYachong
request(#request.admin): MaYachong
session(#session.admin): MaYachong
application(#application.admin): MaYachong
ActionContext(#admin): MaYachongset:(application)
page(#admin): MaYachong
request(#request.admin): MaYachong
session(#session.admin): MaYachong
application(#application.admin): MaYachong
ActionContext(#admin): MaYachong