Print of Multiple document is not correct at single time

if we take printout of multiple document By using Document 01|Document 02|Document 03 then Printout is not correct. it print Purchase Order No. duplicate. same order no. printing at Document 01 and Document 02 but all others are fine. Using 2009 r2

Please use GET and SET functionality to print corresponding header and footer as per the document printing currently. Refer to any Standard Document Reports such as Sales Invoice.