Sorted Table - tabix issue

All,

I have the following code While executing system is pointing to sy-tabix, but the data I am getting in the READ statement is from last record in the internal table

report  z_9699_30.
tables : eket.
types : begin of ty_eket.
        include structure eket.
types:  end of ty_eket.
data: wa_eket                 type ty_eket.
data: it_eket                 like sorted table of wa_eket
                              with unique key primary_key
                              components ebeln ebelp etenr
                              with non-unique sorted key secondary_key
                              components ebeln ebelp.
parameters: p_ebeln like eket-ebeln.
parameters: p_ebelp like eket-ebelp.
select * from eket into table it_eket
      where ebeln eq p_ebeln.
      read table it_eket into wa_eket with table key secondary_key
               components ebeln  = p_ebeln
                          ebelp  = p_ebelp.

Please copy and execute this by giving EBELN and EBELP from EKET

Please make sure while selecting from EKET please select data of multiple records available for same EBELP ie llike

Here below PO # 4500000003 and for Item # 00030 is have multiple records

Here in selection screen by giving PO # as 4500000003 (EBELN) Item # as 00030 (EBELP) , then in the above READ statement system giving SY-TABIX as 3 but if you see the WA_EKET-ETENR is showing 2 instead of 1. This is where is the issue is