Gluster users - May 2012 - Gluster3.3 beta3 detach server unsuccessfully??

Hi,
     Gluster version: 3.3 beta3
     OS : CentOS 6.1
     step 1:I have two servers (hostsname: istore01,istore02) in Gluster peers.
     istore02:  #gluster peer status
                    Number of Peers: 1
                    Hostname: istore01
                    Uuid: 306deb9e-2174-4ce1-a80a-94139691a33a
                    State: Peer in Cluster (Connected)
     step2: then I don't gluster peer detach istore01, I reinstall the
centos6.1 on istore01.
               after istore01 is ok, I use 'gluster peer status' on
istore02, they are always here.
     step3: I use 'gluster peer detach istore01', it tell me ok. but
after I restart istore02.
      istore02:  #gluster peer status
                    Number of Peers: 1
                    Hostname: 192.168.0.200(istore01's IP)
                    Uuid: 306deb9e-2174-4ce1-a80a-94139691a33a
                    State: Peer in Cluster (Connected)  
      The Question : detach server unsuccessfully??

      Tks, Regards,
 
       lawrnce