i created a data report in which i want to group by two criterias (lets say "criteria a" and "criteria b").
And the report does the grouping.
but for every entry in the criteria b he repeats the criteria b grouping.
example:

-Country
Germany
-City
Munich
Berlin
Stuttgart
-City
Munich
Berlin
Stuttgart
-City
Munich
Berlin
Stuttgart

you see: i got three different cities, and now i get the city-grouping three times...
can you help me?