Note that the Report's Detail section is repeated for every row in the report's data source. Since the CrossTab and the report are both bound to data (Report.DataSource is set in order to use the fields from the data source outside of the cross tab)
and the CrossTab is inside the Detail section it will be repeated (with the headers)
for every row in the report's data source.
In order to get rid of the repeating CrossTabs, but having reports DataSource set, I can suggest to move the whole CrossTab item to a report section that doesn't duplicate - such as group headers or footers of a static group.
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