Details section repeating same data

I have created a report using Crystal Reports 2008 that uses a group. The details section of the group is repeating the data 11 times when it should only print it out once, before moving on to the next group.

When I copy the SQL query out of Crystal into SQL server the query only returns the info once for each group so why is the report printing it out 11 times for each group?

How can I fix this.