Dear Uwe,
After testing in K30, I think something wrong in my process. I didn't see any splitting in step 5. Could you please kindly check.
Step 1--> I create the note item only order 33356842 and process batch input in sm35.
This posting is generally right. But the process advance payment with note items can only work if the value of the payment is the same as the note item.
In this case the note item has to be cleared and the line with the advance payment (posting key 19, general ledger indicator A) will be done automatically only with clearing of the note item.