I understand what you're trying to accomplish (random test order within test list), but I'm more interested in why you'd like to do it. What automation problem do you currently have that will be solved by randomizing the test order within a list?
If tests are dependent on one another, then the order is typically fixed and the RecycleBrowser test list setting is set to True. If tests are independent, then their order typically isn't important and it's unclear to us the advantage gained by randomizing their order.
the Telerik team