[TinyOS-Help]about received data packet

[=?big5?B?p/UguFKmdw==?=]

I visited this web  
http://www.tinyos.net/tinyos-1.x/doc/tutorial/lesson6.html
According by this web, I try to key in "java net.tinyos.tools.Listen".
There are two questions I want to ask,
1.Why do i received two data packet at the same time? 
example:
20 01 08 45 FF FF FF FF 08 7D 01 00 01 00 44 00 44 00 FC 21 3B 00 00 00 76 
0B FF
 FF 03 00 FF FF FF FF FF FF FF 7F FF 7F FF 7F
14 01 08 46 FF FF FF FF 07 7D 01 00 01 00 45 00 45 00 01 00 FF FF FE FF FF 
00 00
 00 00 00

2.In that web site, the data packet is :
dest addr   handlerID   groupID   msg len   source addr   counter   channel 
  readings 
7e 00         0a              7d             1a           01 00            
14 00      01 00      96 03 97 03 97 03 98 03 97 03 96 03 97 03 96 03 96 03 
96 03 

It seems not like the data I received...why..?

Lee.

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