Record count in RSA3 and PSA is different

Experts,

I am extracting data from 2LIS_02_SCL. Now when I extract this data in full load in RSA3, I get a total of 19200 records.

When I extract this data to PSA ONLY, the count is 19191. A total of 9 records are dropped while extraction from R3 to BI.

I do not have any infopackage selection criteria.

Any ideas why such a strange behaviour?

Thanks & BR,

Jain