SAP WebIntelligence - Objects don't match

Hi Experts.

I have a anomalous problem with a webi report on a Bex Query (BW).

I need to display a society object ([0COMP_CODE]), period ([0FISCPER]) and Cost class ([0COSTELMNT]) in a horizontal table. When I refresh a webi report, the society object contain the name of cost class (ledger account name), and the period column contain the society object key name. This behavior only exist when the webi report exceeds 20000 rows.

Any idea?

Thank.