Strange Lease Information

[Stephens, Bill {PBSG}]

I'm seeing some strange information in my lease file.  I recently upgraded
to 3.0.1 and received a customer call on the following lease:
Lease on Server 1:
lease 167.27.56.227 {
  starts 1 2004/09/20 21:34:03;
  ends 0 2004/09/19 22:37:55;
  tstp 1 2004/09/20 21:34:03;
  tsfp 1 2004/09/20 21:34:03;
  cltt 0 2004/09/19 22:37:55;
  binding state backup;
  hardware ethernet 00:30:c1:cc:f6:76;
  set opt-system = "jetdirect";
  set logged-vendor-class-identifier = "Hewlett-Packard JetDirect";
  set opt-vendor-class = "Hewlett-Packard JetDirect";
}
Lease on Server 2:

lease 167.27.56.227 {
  starts 1 2004/09/20 21:34:03;
  ends 0 2004/09/19 22:37:55;
  tstp 2 2004/09/21 23:07:55;
  tsfp 1 2004/09/20 21:34:03;
  cltt 0 2004/09/19 22:37:55;
  binding state backup;
  hardware ethernet 00:30:c1:cc:f6:76;
  set logged-vendor-class-identifier = "MSFT 5.0";
  set logged-dhcp-client-identifier = "\001\000\006[\241Y\010";
  set opt-vendor-class = "MSFT 5.0";
  client-hostname "PBGWUD00666";
} 

Why would the start time be after the end time?
Why would both servers think the other owns the lease?
Why would they have differing information for the same mac address?