Data structure gets populated for a junk value

Hi all,

I have File1 defined as below

A          R REC1                        
A             FLD1          11P 2         


File2 defined as below 


A          R REC1                 
A            PACKED        11P 2  
A            NUM            4S 0  


I have a RPG program as below 

The value in File1/Fld1 = 131313123.12


FFILE1   IF  E                    DISK                               
IDS        EIDSFILE2                                                 

C                     READ FILE1                    80               
C           *IN80     DOWEQ*OFF                                      
C                     Z-ADDFLD1      PACKED
C           DS        DSPLY                                          
C                     READ FILE1                    80               
C                     ENDDO                                          
 *                                                                   
C                     SETON                     LR                   


1) The problem is the data structure "DS" is populated with Junk value 

2) When I debug I could see the data structure "DS" has only length of six 
   For Packed and length of four for Num , while the length provided for 
   PACKED in data structure should have been eleven
   when I execute Eval PACKED (Or F11 key) on debug command line I 
   have the correct value of File1/Fld1 = 131313123.12 in PACKED field too
   
3) If I look  at the spool file the data structure has the below structure  

      P   1   62PACKED
          7  100NUM   
      
    For "Num" the starting position should have been 12 15(0) Num
    The total length of the data structure "DS" is DS(10) 
    The length should have been = 15   
   
4) This problem exists in RPT, RPG, RPGLE , how ever I could over come the 
   problem if I define exclusively in the data structure for positions 
   1 to 11(2) Zoned for "PACKED" field   
   
I am currently working on V5R3, could some one please help me on this


Thanks
Sadiq