Delivery date issue in ME23N

Question

Hi,
  I am using the transaction ME23N.  My PO looks somewhat like this(Listed only few fileds to make understand the problem).
*ITEM  A    Short text    Quantity  Order Unit  C    Delivery date    NEt price *
10      K     ABC              1               EA         D     2009.04.11         64.50
20      K     ABC              1               EA         D     2009.10.11         64.50
30      K     ABC              1               EA         D     2009.11.11         64.50
40      K     ABC              1               EA         D     2010.01.01         64.50
When i click on the PRint preview button delivery date for first line item i.e 10 is picking up the last line item's deliver date i.e. 40th line item and after that it is coming in the right sequence. Some what like this.
*ITEM  A    Short text    Quantity  Order Unit  C    Delivery date    Net price *
10      K     ABC              1               EA         D     2010.01.01       64.50
20      K     ABC              1               EA         D      2009.04.11         64.50
30      K     ABC              1               EA         D      2009.10.11         64.50
40      K     ABC              1               EA         D      2009.11.11         64.50
All other values for other columns are displaying correctly.

Answer 1

I have a doubt may be the form or program modified
So that Goto ME23N and Click on the Messages button. check the Output type maybe NEU.
Goto Transaction NACE->chosse Application 'EF' - >Click OUTPUT TYPES - > Choose OUPTTYPES (NEU ?) -> Click on processong routines check the program, Form routine and form for the medium 1.Printout.
if the Program is standard check inside the program is there any enhancement are developed or if the program is custom develoment ?
Kanagaraja L