Delta uploading ,error result

Question: I have a question about BW delta-extracting .
For datasource 2LIS_12_VCITM , after I finished initializing , I will get the data by delta upload . But now some data is double in BW .
In R3 system ,after I modified the header information of delivery note , if this delivery note has 4 items , datasource (2LIS_12_VCITM) should generate 4 reversal entries ( Reversal indicator is 'X' )and 4 new entries . But In fact , I only get 1 reversal entry for first item and 4 new entries . So I will get some double data .
My Plug-in is 2003_1_46C .
Why ?
Pls help us
Any idea will be appreciated

Answer:
Nobody answer me ,

Answer:
I check sytem again .
In R3 QAS , I delete setup table for 12 , and perform setup .

And then I do initialization for datasource 2LIS_12_VCITM without data transfer .Then I modify header of one delivery note with Tcode VL02N .

I can find data with LBWQ and then collective run ,get data in RSA7 .

Result is same ,only first item have reversal indicator . Delta is incorrect .

But for another datasource ( 2LIS_11_VAITM , 2LIS_12_VCSCL) , everything is ok

I'm crazy

Answer:
Sounds like a bug to me then! I would contact OSS asap...

Answer:
Thanks,

I'm waiting for message from SAP now .
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