If you look at the dataenviroment of a wizard-generated report, you'll see that the sorting is handled by the index order of the cursor. If you chose to sort on a field that is not indexed, an index will be created...which I don't find very useful and wouldn't recommend you rely on. YMMV.

>Within the report wizard, you can select both grouping and sorting, but while in report design mode, I can find report grouping but not sorting. Why is this?