Designing groups in multiple columns

hello,
> i am designing a grade report and i got a problem, the problem is that me divided the report into two columns, me grouped the records on the basis of semesters. now i want to show the first semester's records in first column and second semester's records in second column, then third semester's records in first column and so on.. but it doesn't hapens so. i want to set the layout of the group but there is not any option to set layout of the group.there is layout option for section but not for group. what me should do ? ? ?
iam desiginging one report for one student. each student have multiple semester and each semester consist of multiple subjects.I hace CR XI, go to details, section expert, layout with multiple columns, you should see a layout tab pop up in the upper right, click on it, you can control the direction the data flows as well as turn on, layout groups with multiple columns.