Batch Job ME59 created 2 PO for each PR??

Question

Dear Guru,
Please advice me,
I have create a batch job for ther program "RM06BB20" or T-code ME59, which help to convert the PR into PO.
The job is running, just the problem that the job created 2 PO for each of my PR, which is incorrect.
Can anyone please advice me what is the problem for the issue?
Thank you very much,
Regards,
Chee Wee

Answer 1

OSS note 18128 describes:
This is not an error!
The purchase requisition is intentionally not blocked.
Reason: before a purchase order with reference to a purchase requisition is created, a list of purchase requisitions is normally generated (for example, selection by material number or purchasing group - not usually selected directly with the requisition number). Based on this list, the user selects one or more purchase requisitions. However, the requisition cannot simply be blocked after selection; all the purchase requisitions appearing in the corresponding selection list would have to be blocked before display.
Because these lists can be quite long, block situations would quickly occur that would prevent "normal" work.
Because specific purchasers are usually assigned to specific purchasing groups (organizational arrangement), these purchasers normally only select purchase requisitions with an assigned purchasing group. In such cases, the above situation can almost never apply.
Solution
An organizational solution to the problem is required.
However there are notes with contrary info and program fixes like:
Note 1444184 - ME21 does not set a lock on purchase requisition
378335 - ME57/ME21: Block when converting purchase requisitions