In the CSV file, the first column appears to contain the report name (i.e. ARCISTD), the second column contains "SubrequestID" and it seems to write line 1 with Db2 statistics data, and line 2 with blank, similar to the snippet below:
How to stop the report containing the Blank line 2?
z/os DB2
Record Formatting
Modify the ARCISTD request to only write out the "subrequestid" 1 or 2, but not both. To do that, just create a copy of the request in a seperate library and delete all the lines from here:
<< SUBSYS-HWM
X'0002' (OF=A2)
to here:
#IFEND
>>