BEX Filter is not working

Hi,

I have a BEX query with filters on Special Procurement Key 10,20,Y7,ZV,XY and #.

When we run this query, result is displayed for above keys along with Z7 which is not part of the filter.

Any idea why Z7 is shown in the result even though it is not included in the filter.

Please help.

Thanks,

Shridevi B