Cancel customer DP Request VF11 but remain as open item in fbl5n.

Dear SAP Gurus,

i have problem to cancel DP Request. I made DP Request from SD(VF01). And i want to cancel that DP Request because of any reason. so i cancel it through VF11 and its going smoothly. When i see the doc. flow, the status of that DP Request is not cleared but the status of the reverse document is cleared. the both should be have "cleared status", right?

when i see the FBL5N too, the DP Request is still Open, but when i see the cleared item, it shows me the Request has been cleared. but the posting key is 19. i think it should be 09, right?

can you anybody help me solve this issue.

thanks,

Land Lord