The reason is items grow vertically to accommodate their content. Please test using a Table item. use the Table Wizard to bind the data and arrange the item's layout. then in the report designer select a cell from the detail row and add a total row
from the Context Menu
. For more details take a look at the help articles in the Table/Crosstab/List
section of our online help.
There is also an example in the local demos provided with your installation - C:\Program Files (x86)\Telerik\Reporting <VERSION>\Examples\CSharp\ReportLibrary\Crosstab
(the default installation folder).
I hope this information helps you.
New HTML5/JS REPORT VIEWER with MOBILE AND TOUCH SUPPORT available in Telerik Reporting Q3 2013! Get the new Reporting version from your account or download a trial.